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# Bash program to check if the Number is a Palindrome

• Difficulty Level : Medium
• Last Updated : 05 Sep, 2022

Given a number num, find whether the given number is palindrome or not using Bash Scripting. Examples:

```Input :
666
Output :
Number is palindrome

Input :
45667
Output :
Number is NOT palindrome```

## Recommended: Please try your approach on {IDE} first, before moving on to the solution.

Approach To find the given number is palindrome just check if the number is same from beginning and the end. Reverse the number to check if the number reversed is equal to the original number or not, if yes than echo Number is palindrome otherwise echo Number is NOT palindrome .

## BASH

 `num=545`` ` `# Storing the remainder``s=0`` ` `# Store number in reverse``# order``rev=``""`` ` `# Store original number``# in another variable``temp=\$num`` ` `while` `[ \$num -gt 0 ]``do``    ``# Get Remainder``    ``s=\$(( \$num % 10 )) ``    ` `    ``# Get next digit``    ``num=\$(( \$num / 10 ))``    ` `    ``# Store previous number and``    ``# current digit in reverse``    ``rev=\$( ``echo` `\${rev}\${s} )``done`` ` `if` `[ \$temp -``eq` `\$rev ];``then``    ``echo` `"Number is palindrome"``else``    ``echo` `"Number is NOT palindrome"``fi`

Output:

`Number is palindrome`

Time complexity: O(logn) as while loop would run for logn times

Auxiliary space: O(1)

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