Objective: Write Given two integers ‘number’ and ‘divisor’, Write an algorithm to find the remainder if ‘number’ is divided by ‘divisor’.
Condition: You are not allowed to use modulo or % operator.
Example:
num = 10, divisor = 4 remainder = 2 num = 11, divisor = 2 remainder = 1
This is fun puzzle which is asked in the interview.
Approach:
1. This problem will become very trivial if use of modulo or % operator is allowed.
2. Idea is Keep subtracting the divisor from number till number>=divisor.
3. Once the step above is done, remaining value of number will be the remainder.
Example:
number = 10, divisor = 4 number = number – divisor => 10 – 4 = 6 number = number – divisor => 6 – 4 = 2 remainder = 2
Code:
Output:
Number: 10, divisor: 4. remainder: 2