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Command Reference: while

Loop until condition false

Description

while loops until loops until condition is false.

Normally the conditional and executed code block are 2 separate parameters however you can call while with just 1 parameter where the code block acts as both the conditional and the code to be ran.

Usage

Until true

while { condition } { code-block } -> <stdout>

while { code-block } -> <stdout>

Until false

!while { condition } { code-block } -> <stdout>

`` !while { code-block } -> <std

Examples

while $i is less then 5

» let i=0; while { =i<5 } { let i=i+1; out $i }
1
2
3
4
5

» let i=0; while { let i=i+1; = i<5; out }
true
true
true
true
false

while $i is NOT greater than or equal to 5

» let i=0; !while { =i>=5 } { let i=i+1; out $i }
1
2
3
4
5

» let i=0; while { let i=i+1; = i>=5; out }
true
true
true
true
false

Synonyms

• while
• !while

See Also

• commands/err: Print a line to the STDERR
• commands/for: A more familiar iteration loop to existing developers
• commands/foreach: Iterate through an array
• commands/formap: Iterate through a map or other collection of data
• commands/global: Define a global variable and set it’s value
• commands/let: Evaluate a mathematical function and assign to variable
• commands/out: Print a string to the STDOUT with a trailing new line character
• commands/set: Define a local variable and set it’s value