In this tutorial, we will learn about if-else statements in Perl. We will cover the basics of conditional execution using if-else statements.
An if-else statement is a conditional statement that executes one block of code if a specified condition is true, and another block of code if the condition is false.
The syntax for the if-else statement in Perl is:
if (condition) {
# Code block to execute if condition is true
} else {
# Code block to execute if condition is false
}
The if-else statement evaluates the specified condition. If the condition is true, the code block inside the if statement is executed; otherwise, the code block inside the else statement is executed.
$num
.$num
.$num
is even or odd.$num
is even or odd.my $num = 10;
if ($num % 2 == 0) {
print "$num is even.";
} else {
print "$num is odd.";
}
10 is even.
$str
.$str
.$str
starts with a specific value.my $str = "Hello, world!";
if ($str =~ /^Hello/) {
print "String starts with 'Hello'.";
} else {
print "String does not start with 'Hello'.";
}
String starts with 'Hello'.
$num
.$num
.$num
is positive or negative.$num
is positive or negative.my $num = -5;
if ($num > 0) {
print "$num is positive.";
} else {
print "$num is negative or zero.";
}
-5 is negative or zero.