# Day 9 of 31-Day May LeetCode Challenge

1 min readMay 9, 2020

Given a positive integer *num*, write a function which returns True if *num* is a perfect square else False.

**Note:** **Do not** use any built-in library function such as `sqrt`

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1 min readMay 9, 2020

Given a positive integer *num*, write a function which returns True if *num* is a perfect square else False.

**Note:** **Do not** use any built-in library function such as `sqrt`

.