You need Vipsi command syntax: Identifiers (names)
Identifiers, names
Operators: Make Identifier "@"
Text functions: name
Glossary: Name, Identifiernames for your Glossary: Variable, var_refvariables Operators: Boolean And with Variable "&&="
Operators: Bitwise And with Variable "&="
Operators: Bitwise And "&"
Operators: Boolean And "&&"and Vipsi command syntax: Procedures
Data Types: Procedures
Glossary: Procedureprocedures. Also each item in a Data Types: Lists and arrays
Item selector "[]": Lists
Glossary: list, list_vallist may be named. In fact, all Glossary: Variable, var_refvariables that you define are Instructions: putput in a Data Types: Lists and arrays
Item selector "[]": Lists
Glossary: list, list_vallist which is named List functions: globals
Shell Immediate Commands: globalsglobals.

There are nearly no restrictions on Glossary: Variable, var_refvariable Vipsi command syntax: Identifiers (names)
Identifiers, names
Operators: Make Identifier "@"
Text functions: name
Glossary: Name, Identifiernames. Any sequence of data may be used as a Glossary: Variable, var_refvariable's Vipsi command syntax: Identifiers (names)
Identifiers, names
Operators: Make Identifier "@"
Text functions: name
Glossary: Name, Identifiername. but there are restrictions on Vipsi command syntax: Identifiers (names)
Identifiers, names
Operators: Make Identifier "@"
Text functions: name
Glossary: Name, Identifiernames which are recognized by vipsi easily.

Flow control: if … then
Flow control: try … thenThe following rules must be obeyed for Instructions: newnew Vipsi command syntax: Identifiers (names)
Identifiers, names
Operators: Make Identifier "@"
Text functions: name
Glossary: Name, Identifiernames:

• Vipsi command syntax: Identifiers (names)
  Identifiers, names
  Operators: Make Identifier "@"
  Text functions: name
  Glossary: Name, IdentifierNames must start with a letter Operators: Boolean Or with Variable "||="
  Operators: Bitwise Or with Variable "|="
  Operators: Bitwise Or "|"
  Operators: Boolean Or "||"or with '_'. List functions: thisThis may be a latin letter, greece, Operators: Boolean Or with Variable "||="
  Operators: Bitwise Or with Variable "|="
  Operators: Bitwise Or "|"
  Operators: Boolean Or "||"or ... yes you got it.
• Subsequent characters must be a letter, '_' Operators: Boolean Or with Variable "||="
  Operators: Bitwise Or with Variable "|="
  Operators: Bitwise Or "|"
  Operators: Boolean Or "||"or a Glossary: number, num_valnumber digit. Glossary: number, num_valNumber digits of other Example Scripts: CGI Scripts
  Example Scripts: Scriptsscript systems are allowed.
• Vipsi command syntax: Identifiers (names)
  Identifiers, names
  Operators: Make Identifier "@"
  Text functions: name
  Glossary: Name, IdentifierNames must be 255 characters Numeric functions: maxmax.
• Vipsi command syntax: Identifiers (names)
  Identifiers, names
  Operators: Make Identifier "@"
  Text functions: name
  Glossary: Name, IdentifierNames must Operators: Bitwise Not "~"
  Operators: Boolean Negation "!"not be a List functions: words
  Shell Immediate Commands: wordsword pre-defined by Flow control: if … then
  Flow control: try … thenthe vips Example Scripts: CGI Scripts
  Example Scripts: Scriptsscript language.

Examples of legal names:

 anton, cäsar, µ, ΩOperators: Subtract "-"sub, sin21, _, _liste_, Café, Smørebrød, Жизмн.

Examples of illegal names:

catch 23      contains space
Numeric functions: sinsin           pre-defined List functions: words
Shell Immediate Commands: wordsword
6pack         starts with a Glossary: number, num_valnumber
big-letters   no '-' allowed

No restrictions on names

In fact, Flow control: if … then
Flow control: try … thenthe above restrictions are only imposed on Flow control: if … then
Flow control: try … thenthe Example Scripts: CGI Scripts
Example Scripts: Scriptsscript parser. Glossary: Variable, var_refVariable Vipsi command syntax: Identifiers (names)
Identifiers, names
Operators: Make Identifier "@"
Text functions: name
Glossary: Name, Identifiernames may be really any Vipsi command syntax: Identifiers (names)
Identifiers, names
Operators: Make Identifier "@"
Text functions: name
Glossary: Name, Identifiername.
e.g. frequently you have Glossary: Variable, var_refvariables with an empty Vipsi command syntax: Identifiers (names)
Identifiers, names
Operators: Make Identifier "@"
Text functions: name
Glossary: Name, Identifiername, e.g. command line Vipsi command syntax: Arguments
Glossary: Argumentsarguments which are stored as unnamed Glossary: Variable, var_refvariables in Flow control: if … then
Flow control: try … thenthe List functions: globals
Shell Immediate Commands: globalsglobals Data Types: Lists and arrays
Item selector "[]": Lists
Glossary: list, list_vallist Glossary: Variable, var_refvariable Operators: Boolean Or with Variable "||="
Operators: Bitwise Or with Variable "|="
Operators: Bitwise Or "|"
Operators: Boolean Or "||"or most commonly unnamed items in Data Types: Lists and arrays
Item selector "[]": Lists
Glossary: list, list_vallists. You can create Operators: Boolean And with Variable "&&="
Operators: Bitwise And with Variable "&="
Operators: Bitwise And "&"
Operators: Boolean And "&&"and access Flow control: if … then
Flow control: try … thenthem with Flow control: if … then
Flow control: try … thenthe help of Flow control: if … then
Flow control: try … thenthe @ prefix Vipsi command syntax: Operators
Operators
Glossary: Operatoroperator:

// define Glossary: Variable, var_refvariable with Vipsi command syntax: Identifiers (names)
Identifiers, names
Operators: Make Identifier "@"
Text functions: name
Glossary: Name, Identifiername "55":
Instructions: var
How does VScript::Value() work?: Var*&var @"55" = 66; Instructions: putput @"55"

// fetch Glossary: Variable, var_refvariable by a computed Vipsi command syntax: Identifiers (names)
Identifiers, names
Operators: Make Identifier "@"
Text functions: name
Glossary: Name, Identifiername:
Instructions: var
How does VScript::Value() work?: Var*&var vname="";
Instructions: putput Constants: nlnl,"which Instructions: var
How does VScript::Value() work?: Var*&var? "; Instructions: getget vname;
Flow control: if … thenif(Numeric functions: existsexists @vname) Instructions: putput " = ",@vname,Constants: nlnl Flow control: if … then
Flow control: try … thenelse Instructions: putput "Flow control: do … loopdoes Operators: Bitwise Not "~"
Operators: Boolean Negation "!"not Numeric functions: existsexist",Constants: nlnl Flow control: if … then
Flow control: try … thenthen

// Instructions: renamerename Glossary: Variable, var_refvariables to computed Vipsi command syntax: Identifiers (names)
Identifiers, names
Operators: Make Identifier "@"
Text functions: name
Glossary: Name, Identifiernames:
Instructions: var
How does VScript::Value() work?: Var*&var Data Types: Text
Item selector "[]": Text
Glossary: text, text_valtext = Text functions: file
Instructions: filefile("test Text functions: file
Instructions: filefile.txt")
List functions: split
Instructions: splitsplit Data Types: Text
Item selector "[]": Text
Glossary: text, text_valtext          // List functions: split
Instructions: splitsplit Data Types: Text
Item selector "[]": Text
Glossary: text, text_valtext Operators: Make Identifier "@"at line breaks --> Data Types: Lists and arrays
Item selector "[]": Lists
Glossary: list, list_vallist of Glossary: text_ref, text_vartexts
var i=0
Flow control: do … loopdo  Flow control: whilewhile ++i <= Numeric functions: countcount Data Types: Text
Item selector "[]": Text
Glossary: text, text_valtext
    Instructions: renamerename Data Types: Text
Item selector "[]": Text
Glossary: text, text_valtext[i] = Data Types: Text
Item selector "[]": Text
Glossary: text, text_valtext[i]
Flow control: do … looploop

In About this Guide: General
Built-in operators: Generalgeneral you won't need it Operators: Boolean And with Variable "&&="
Operators: Bitwise And with Variable "&="
Operators: Bitwise And "&"
Operators: Boolean And "&&"and it is a feature sys: For experts:for experts Operators: Boolean And with Variable "&&="
Operators: Bitwise And with Variable "&="
Operators: Bitwise And "&"
Operators: Boolean And "&&"and Operators: Bitwise Not "~"
Operators: Boolean Negation "!"not beginners. See Flow control: if … then
Flow control: try … thenthe Example Scriptsexample script "count_words.vs" for an application of List functions: thisthis feature.

Scope of names

You can Operators: Item selector "[]"
Operators: Select "? :"select a named item in any Data Types: Lists and arrays
Item selector "[]": Lists
Glossary: list, list_vallist with Flow control: if … then
Flow control: try … thenthe "." Vipsi command syntax: Operators
Operators
Glossary: Operatoroperator. Whenever a Data Types: Lists and arrays
Item selector "[]": Lists
Glossary: list, list_vallist is searched for a given Vipsi command syntax: Identifiers (names)
Identifiers, names
Operators: Make Identifier "@"
Text functions: name
Glossary: Name, Identifiername, Flow control: if … then
Flow control: try … thenthen Flow control: if … then
Flow control: try … thenthe search starts Operators: Make Identifier "@"at Flow control: if … then
Flow control: try … thenthe Data Types: Lists and arrays
Item selector "[]": Lists
Glossary: list, list_vallist Flow control: end
Shell Immediate Commands: exit, quit, endend. Flow control: if … then
Flow control: if … thenIf the Data Types: Lists and arrays
Item selector "[]": Lists
Glossary: list, list_vallist contains more than one item with Flow control: if … then
Flow control: try … thenthe same Vipsi command syntax: Identifiers (names)
Identifiers, names
Operators: Make Identifier "@"
Text functions: name
Glossary: Name, Identifiername, Flow control: if … then
Flow control: try … thenthen searching for that Vipsi command syntax: Identifiers (names)
Identifiers, names
Operators: Make Identifier "@"
Text functions: name
Glossary: Name, Identifiername Flow control: returnreturns Flow control: if … then
Flow control: try … thenthe last item.

Operators: Make Identifier "@"At 'ground level', that is outside any Vipsi command syntax: Procedures
Data Types: Procedures
Glossary: Procedureprocedure, all Vipsi command syntax: Identifiers (names)
Identifiers, names
Operators: Make Identifier "@"
Text functions: name
Glossary: Name, Identifiernames are searched in Flow control: if … then
Flow control: try … thenthe Data Types: Lists and arrays
Item selector "[]": Lists
Glossary: list, list_vallist of List functions: globals
Shell Immediate Commands: globalsglobal Glossary: Variable, var_refvariables. You can create nested ranges of Vipsi command syntax: Statements
Glossary: Statementstatements with private Glossary: Variable, var_refvariable scope using Separators: Curly brackets "{ … }"
Instructions: Local scope "{}"braces: { ... }. Flow control: if … then
Flow control: try … thenThen Flow control: if … then
Flow control: try … thenthe search starts in Flow control: if … then
Flow control: try … thenthe innermost privates scope, extending to surrounding private scopes up to Flow control: if … then
Flow control: try … thenthe List functions: globals
Shell Immediate Commands: globalsglobal scope, Flow control: untiluntil an item of Flow control: if … then
Flow control: try … thenthe requested Vipsi command syntax: Identifiers (names)
Identifiers, names
Operators: Make Identifier "@"
Text functions: name
Glossary: Name, Identifiername ist found.

1. Innermost { .. } private scope ...
   ... List functions: globals
   Shell Immediate Commands: globalsglobals of Flow control: if … then
   Flow control: try … thenthe program

Inside a Vipsi command syntax: Procedures
Data Types: Procedures
Glossary: Procedureprocedure Flow control: if … then
Flow control: try … thenthe search Functions with varying return types: include
Instructions: includeincludes Flow control: if … then
Flow control: try … thenthe Data Types: Lists and arrays
Item selector "[]": Lists
Glossary: list, list_vallist of List functions: localslocal Glossary: Variable, var_refvariables Operators: Boolean And with Variable "&&="
Operators: Bitwise And with Variable "&="
Operators: Bitwise And "&"
Operators: Boolean And "&&"and Flow control: if … then
Flow control: try … thenthe Data Types: Lists and arrays
Item selector "[]": Lists
Glossary: list, list_vallist which contains Flow control: if … then
Flow control: try … thenthe Vipsi command syntax: Procedures
Data Types: Procedures
Glossary: Procedureprocedure itself. Flow control: if … then
Flow control: try … thenThen Flow control: if … then
Flow control: try … thenthe search starts in Flow control: if … then
Flow control: try … thenthe innermost privates scope, extending to surrounding private scopes up to Flow control: if … then
Flow control: try … thenthe Instructions: Local scope "{}"local scope, Flow control: if … then
Flow control: try … thenthen scanning Flow control: if … then
Flow control: try … thenthe Data Types: Lists and arrays
Item selector "[]": Lists
Glossary: list, list_vallist which contains Flow control: if … then
Flow control: try … thenthe Vipsi command syntax: Procedures
Data Types: Procedures
Glossary: Procedureprocedure itself Operators: Boolean And with Variable "&&="
Operators: Bitwise And with Variable "&="
Operators: Bitwise And "&"
Operators: Boolean And "&&"and finaly searching through Flow control: if … then
Flow control: try … thenthe List functions: globals
Shell Immediate Commands: globalsglobals Data Types: Lists and arrays
Item selector "[]": Lists
Glossary: list, list_vallist, Flow control: untiluntil an item of Flow control: if … then
Flow control: try … thenthe requested Vipsi command syntax: Identifiers (names)
Identifiers, names
Operators: Make Identifier "@"
Text functions: name
Glossary: Name, Identifiername ist found.

1. Innermost { .. } private scope ...
   ... List functions: localslocals of Flow control: if … then
   Flow control: try … thenthe Vipsi command syntax: Procedures
   Data Types: Procedures
   Glossary: Procedureprocedure
2. Data Types: Lists and arrays
   Item selector "[]": Lists
   Glossary: list, list_valList which contains Flow control: if … then
   Flow control: try … thenthe Vipsi command syntax: Procedures
   Data Types: Procedures
   Glossary: Procedureprocedure
3. List functions: globals
   Shell Immediate Commands: globalsGlobals of Flow control: if … then
   Flow control: try … thenthe program

What is 'searching Flow control: if … then
Flow control: try … thenthe Data Types: Lists and arrays
Item selector "[]": Lists
Glossary: list, list_vallist which contains Flow control: if … then
Flow control: try … thenthe Vipsi command syntax: Procedures
Data Types: Procedures
Glossary: Procedureprocedure' good for?

Flow control: if … then
Flow control: try … thenThe Vipsi command syntax: Procedures
Data Types: Procedures
Glossary: Procedureprocedure might be locally defined inside another Vipsi command syntax: Procedures
Data Types: Procedures
Glossary: Procedureprocedure. Flow control: if … then
Flow control: try … thenThen Flow control: if … then
Flow control: try … thenthe Vipsi command syntax: Procedures
Data Types: Procedures
Glossary: Procedureprocedure is a List functions: localslocal Glossary: Variable, var_refvariable. Using Flow control: if … then
Flow control: try … thenthe parent Data Types: Lists and arrays
Item selector "[]": Lists
Glossary: list, list_vallist search it can easily access all List functions: localslocal Glossary: Variable, var_refvariables of Flow control: if … then
Flow control: try … thenthe enclosing Vipsi command syntax: Procedures
Data Types: Procedures
Glossary: Procedureprocedure too.

Operators: Boolean Or with Variable "||="
Operators: Bitwise Or with Variable "|="
Operators: Bitwise Or "|"
Operators: Boolean Or "||"Or you Instructions: putput Vipsi command syntax: Procedures
Data Types: Procedures
Glossary: Procedureprocedures into complicated Data Types: Lists and arrays
Item selector "[]": Lists
Glossary: list, list_vallists to manage some aspects, offering a light-weight approach to object oriented programming.