Sqrt(x)
CodingOnsiteSoftware EngineerReported Apr, 2026Low Frequency
Examples
Example 1:
Input: x = 4
Output: 2
Explanation:
Example 2:
Input: x = 8
Output: 2
Explanation:
Example 1:
Input: x = 4
Output: 2
Explanation:
Example 2:
Input: x = 8
Output: 2
Explanation:
Given a non-negative integer x, return the square root of x rounded down to the nearest integer. The returned integer should be non-negative as well.
You must not use any built-in exponent function or operator.
For example, do not use pow(x, 0.5) in C++ or x ** 0.5 in Python.
The square root of 4 is 2, so we return 2.
The square root of 8 is 2.82842..., and since we round it down to the nearest integer, 2 is returned.
0 <= x <= 2^31 - 1