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unless-else statement in Perl

Last Updated: February 7, 2017 by Chaitanya Singh | Filed Under: Perl

Similar to unless statement, the unless-else statement in Perl behaves opposite to the if-else statement. In unless-else, the statements inside unless gets executed if the condition is false and statements inside else gets executed if the condition is true.

unless(condition) {
   #These statements would execute
   #if the condition is false.
   statement(s);
}
else {
   #These statements would execute
   #if the condition is true.
   statement(s);
}

Example

#!/usr/local/bin/perl

printf "Enter any number:";
$num = <STDIN>;
unless($num>=100) {
   #This print statement would execute,
   #if the given condition is false
   printf "num is less than 100\n";
}
else {
   #This print statement would execute,
   #if the given condition is true
   printf "number is greater than or equal to 100\n";
}

Output:

Enter any number:100
number is greater than or equal to 100

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About the Author

I have 15 years of experience in the IT industry, working with renowned multinational corporations. Additionally, I have dedicated over a decade to teaching, allowing me to refine my skills in delivering information in a simple and easily understandable manner.

– Chaitanya

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