These are also called relational operators in Perl. Assume variable $a holds 10 and variable $b holds 20 then, let's check the following numeric equality operators available in Perl −Sr.No.Operator & Description1== (equal to)Checks if the value of two operands are equal or not, if yes then condition becomes true.Example− ... Read More

Assume variable $a holds 10 and variable $b holds 20, then following are the Perl arithmetic operators −Sr.No.Operator & Description1+ ( Addition )Adds values on either side of the operatorExample− $a + $b will give 302- (Subtraction)Subtracts right-hand operand from the left-hand operandExample− $a - $b will give -103* (Multiplication)Multiplies ... Read More

A loop becomes an infinite loop if a condition never becomes false. The for loop is traditionally used for this purpose. Since none of the three expressions that form the loop are required, in Perl, you can make an endless loop by leaving the conditional expression empty.#!/usr/local/bin/perl for( ; ; ... Read More

Loop control statements change the execution from its normal sequence. When execution leaves a scope, all automatic objects that were created in that scope are destroyed.Perl supports the following control statements. Click the following links to check their detail.Sr.No.Control Statement & Description1next statementIt causes the loop to skip the remainder ... Read More

Let's check the conditional operator? : in Perl which can be used to replace if...else statements. It has the following general form −SyntaxExp1 ? Exp2 : Exp3;Where Exp1, Exp2, and Exp3 are expressions. Notice the use and placement of the colon.The value of a? expression is determined like this: Exp1 ... Read More

Adding a new key/value pair in a Perl hash can be done with one line of code using a simple assignment operator. But to remove an element from the hash you need to use delete function as shown below in the example −Example Live Demo#!/usr/bin/perl %data = ('John Paul' => 45, ... Read More

You can get the size - that is, the number of elements from a hash in Perl by using the scalar context on either keys or values. Simply saying first you have to get an array of either the keys or values and then you can get the size of ... Read More

If you try to access a key/value pair from a hash in Perl that doesn't exist, you'll normally get the undefined value, and if you have warnings switched on, then you'll get a warning generated at run time. You can get around this by using the exists function, which returns ... Read More

You can get a list of all of the keys from a hash in Perl by using keys function, which has the following syntax −keys %HASHThis function returns an array of all the keys of the named hash. Following is the example −Example Live Demo#!/usr/bin/perl %data = ('John Paul' => 45, ... Read More

When accessing individual elements from a hash in Perl, you must prefix the variable with a dollar sign ($) and then append the element key within curly brackets after the name of the variable. For example −Example Live Demo#!/usr/bin/perl %data = ('John Paul' => 45, 'Lisa' => 30, 'Kumar' => 40); ... Read More