In this tutorial, we will learn about else-if statements in Perl. We will cover the basics of conditional execution using if-else-if statements.
An else-if statement is a conditional statement that allows multiple conditions to be tested sequentially. It provides a way to execute different code blocks based on different conditions.
The syntax for the else-if statement in Perl is:
if (condition1) {
# Code block to execute if condition1 is true
} elsif (condition2) {
# Code block to execute if condition2 is true
} else {
# Code block to execute if none of the conditions are true
}
The else-if statement evaluates the specified conditions in order. The first condition that is true will have its code block executed; if none of the conditions are true, the code block inside the else statement is executed.
num
.num
.num
is positive, negative, or zero.num
is positive, negative, or zero.my $num = -5;
if ($num > 0) {
print "$num is positive.\n";
} elsif ($num < 0) {
print "$num is negative.\n";
} else {
print "$num is zero.\n";
}
-5 is negative.
marks
.marks
.marks
.my $marks = 85;
if ($marks >= 90) {
print "Grade: A\n";
} elsif ($marks >= 80) {
print "Grade: B\n";
} elsif ($marks >= 70) {
print "Grade: C\n";
} elsif ($marks >= 60) {
print "Grade: D\n";
} else {
print "Grade: F\n";
}
Grade: B
temperature
.temperature
.temperature
.my $temperature = 75.5;
if ($temperature > 100) {
print "It's extremely hot.\n";
} elsif ($temperature > 85) {
print "It's hot.\n";
} elsif ($temperature > 60) {
print "It's warm.\n";
} elsif ($temperature > 32) {
print "It's cold.\n";
} else {
print "It's freezing.\n";
}
It's warm.