Create Check_for_palindrome.md

snippets/Check_for_palindrome.md

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+### Check For Palindrome
+
+```
+function palindrome(str) {
+  var rg =/[\W_]/g;
+  var low_rep=str.toLowerCase().replace(rg,'');
+  var final= low_rep.split('').reverse().join('');
+  return final == low_rep;
+ }
+ ```