**Objective**: Given a number n, write a program to calculate Log_{2}n without using built-in function.

**Example**:

N = 32 Log_{2}32 = 5 N = 64 Log_{2}64 = 6

**Approach**:

- Initialize result = 0.
- Keep dividing the given number by 2 till number is greater than 0 and add one to the result if n is greater than equal to 1.

**Java Code:**

**Output:**

Log64 value: 6