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JavaScript

Posted by Himanshu Thanvi
Himanshu Thanvi
899 Points

javascript for-loop

let num = 343
let temp=num
let value=0
while (num > 0) {
  let rem= num%10
  value = value*10 + rem
  num=num/10
}

if(temp == value){
  console.log(`${temp} is a Palindrome No`)
}
else
  console.log('it is not a palindrome no.');

output is always shown as not a palindrome no.

1 Answer

Steven Parker
Steven Parker
243,266 Points
Steven Parker
Steven Parker
243,266 Points

When you divide by 10, "num" gets smaller but will continue to be larger than 0 until the floating-point precision is exhausted. So the loop runs many times, and "value" becomes a very large number.

What you probably intended is to get only the full integer result of the division without the fractional part. This can be done with the "floor" function of the Math library:

  num = Math.floor(num / 10);
Himanshu Thanvi
Himanshu Thanvi
899 Points

thats right , the code is running correct now