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Learn Perl from Scratch

Until Loop

Explore how the Perl until loop works by executing code blocks repeatedly as long as a specified condition remains false. Understand its syntax and practical applications to improve your skills in writing efficient loops and controlling program flow within your Perl scripts.

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What is an until loop?

The until loop continues to execute the statements in its block as long as the condition is false.

The syntax is as follows:

​Again, the curly braces surrounding the body of the until loop indicate that multiple statements can be executed as part of this loop.

Example

Take a look at the until loop code:

Perl
$y=0;
until ( $y > 5 ) {   # the until loop will run "until" the condition is false               
$y += 1;
print "The value of y is: $y\n";
} #the loop will iterate 6 times

Explanation

Below is an illustration of the code above to help you better understand the logic.