Q. PHP program to swap two numbers without using temporary variable.
Here you will find an algorithm and program in PHP to swap 2 numbers without using any third or temporary variable.
Swapping two number : Swap two numbers means exchange the values of two variables with each other. Suppose we are given 2 numbers num1 = 10 and num2 = 20 and we have to swap these 2 numbers without using third variable. After swaping value of num1 = 20 and num2 = 10.
Algorithm to swap two numbers without using third variable
START Step 1 -> Take two integer as input num1 and num2. Step 2 -> Print number before swapping Step 3 -> num1 = num1 + num2; Step 4 -> num2 = num1 - num2; Step 5 -> num1 = num1 - num2; Step 6 -> Print numbers after swapping STOP
PHP Program to Swap Two Numbers Without Using Temporary Variable
<?php $num1=10; $num2=20; echo "Number before swapping is $num1 and $num2 \n"; $num1=$num1+$num2; $num2=$num1-$num2; $num1=$num1-$num2; echo "Number after swapping is $num1 and $num2"; ?>
Enter Two Numbers : 10 20 Number before swapping is 10 and 20 Number after swapping is 20 and 10