while

Execute a command repeatedly while a condition is true.

Syntax

while test command

Parameters

• test: Boolean expression evaluated with expr before each iteration
• command: Script to execute while test is true

Examples

Basic countdown

Output

Reading until condition

Output

Using break for complex exit

Output

Fibonacci sequence

Output

See Also

• for - C-style loop
• foreach - Iterate over list elements
• break - Exit a loop
• continue - Skip to next iteration