﻿ CoffeeScript function: Check whether a passed string is a palindrome or not? - w3resource

# CoffeeScript function: Check whether a passed string is a palindrome or not

## CoffeeScript Function : Exercise-10 with Solution

Write a CoffeeScript function that checks whether a passed string is a palindrome or not?

Note: A palindrome is a word, phrase, or sequence that reads the same backward as forward, e.g., madam or nurses run.

## Solution :

HTML Code :

```<!DOCTYPE html>
<html>
<meta charset="utf-8">
<title>JS Bin</title>
<body>

</body>
</html>
```

CoffeeScript Code :

```check_Palindrome = (str_entry) ->
# Change the string into lower case and remove  all non-alphanumeric characters
cstr = str_entry.toLowerCase().replace(/[^a-zA-Z0-9]+/g, '')
ccount = 0
# Check whether the string is empty or not
if cstr == ''
return false
# Check if the length of the string is even or odd
if cstr.length % 2 == 0
ccount = cstr.length / 2
else
# If the length of the string is 1 then it becomes a palindrome
if cstr.length == 1
return true
else
# If the length of the string is odd ignore middle character
ccount = (cstr.length - 1) / 2
# Loop through to check the first character to the last character and then move next
x = 0
while x < ccount
# Compare characters and drop them if they do not match
if cstr[x] != cstr.slice(-1 - x)[0]
alert 'Entry is not a palindrome.'
return false
x++
alert 'The entry is a palindrome.'
true

check_Palindrome 'nurses run'
check_Palindrome 'fox'
```

Live Demo :

JS Bin on jsbin.com

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