Division without using ‘/’ operator

Given two numbers, divide one from other without using ‘/’ operator. 
Examples :

Input : num1 = 13, num2 = 2
Output : 6

Input : num1 = 14, num2 = -2
Output : -7

Input : num1 = -11, num2 = 3
Output : -3

Input : num1 = 10, num2 = 10
Output : 1

Input : num1 = -6, num2 = -2
Output : 3

Input : num1 = 0, num2 = 5
Output : 0

In order to perform division operation without using ‘/’ operator we followed the approach, in which we count the number of successful or complete number of subtraction of num2 from num1. Where num1 is the number to be divided and num2 is the number from which we have to divide num1.

C++

// CPP program to divide a number by other
// without using / operator
#include <bits/stdc++.h>
using namespace std;

// Function to find division without using
// '/' operator
int division(int num1, int num2)
{
   if (num1 == 0)
       return 0;
   if (num2 == 0)
     return INT_MAX;

   bool negResult = false;

   // Handling negative numbers
   if (num1 < 0)
   {
       num1 = -num1 ;
       if (num2 < 0)
           num2 = - num2 ;
       else
           negResult = true;
   }
   else if (num2 < 0)
   {
       num2 = - num2 ;
       negResult = true;
   }

   // if num1 is greater than equal to num2
   // subtract num2 from num1 and increase
   // quotient by one.
   int quotient = 0;
   while (num1 >= num2)
   {
       num1 = num1 - num2 ;
       quotient++ ;
   }

   // checking if neg equals to 1 then making
   // quotient negative
   if (negResult)
        quotient = - quotient ;
   return quotient ;
}

// Driver program
int main()
{
    int num1 = 13, num2 = 2 ;
    cout << division(num1, num2); ;
    return 0;
}

Java

// Java program to divide a number by other
// without using / operator
import java.io.*;

class GFG
{
    // Function to find division without using
    // '/' operator
    static int division(int num1, int num2)
    {
        if (num1 == 0)
            return 0;
        if (num2 == 0)
            return Integer.MAX_VALUE;

        boolean negResult = false;

        // Handling negative numbers
        if (num1 < 0)
        {
            num1 = -num1 ;
            if (num2 < 0)
                num2 = - num2 ;
            else
                negResult = true;
        }
        else if (num2 < 0)
        {
            num2 = - num2 ;
            negResult = true;
        }

        // if num1 is greater than equal to num2
        // subtract num2 from num1 and increase
        // quotient by one.
        int quotient = 0;
        while (num1 >= num2)
        {
            num1 = num1 - num2 ;
            quotient++ ;
        }

        // checking if neg equals to 1 then making
        // quotient negative
        if (negResult)
                quotient = - quotient ;
        return quotient ;
    }

    // Driver program
    public static void main (String[] args)
    {
        int num1 = 13, num2 = 2 ;
        System.out.println( division(num1, num2));

    }
}

// This code is contributed by vt_m.

Python3

# Python3 program to divide a number
# by other without using / operator

# Function to find division without
# using '/' operator
def division(num1, num2):

    if (num1 == 0): return 0
    if (num2 == 0): return INT_MAX

    negResult = 0

    # Handling negative numbers
    if (num1 < 0):
        num1 = - num1

        if (num2 < 0):
            num2 = - num2
        else:
            negResult = true

    elif (num2 < 0):
        num2 = - num2
        negResult = true

    # if num1 is greater than equal to num2
    # subtract num2 from num1 and increase
    # quotient by one.
    quotient = 0

    while (num1 >= num2):
        num1 = num1 - num2
        quotient += 1

    # checking if neg equals to 1 then
    # making quotient negative
    if (negResult):
            quotient = - quotient
    return quotient

# Driver program
num1 = 13; num2 = 2
print(division(num1, num2))

# This code is contributed by Ajit.

C#

// C# program to divide a number by other
// without using / operator
using System;

class GFG
{
    // Function to find division without
    // using '/' operator
    static int division(int num1, int num2)
    {
        if (num1 == 0)
            return 0;
        if (num2 == 0)
            return int.MaxValue;

        bool negResult = false;

        // Handling negative numbers
        if (num1 < 0)
        {
            num1 = -num1 ;
            if (num2 < 0)
                num2 = - num2 ;
            else
                negResult = true;
        }
        else if (num2 < 0)
        {
            num2 = - num2 ;
            negResult = true;
        }

        // if num1 is greater than equal to num2
        // subtract num2 from num1 and increase
        // quotient by one.
        int quotient = 0;
        while (num1 >= num2)
        {
            num1 = num1 - num2 ;
            quotient++ ;
        }

        // checking if neg equals to 1 then making
        // quotient negative
        if (negResult)
                quotient = - quotient ;
        return quotient ;
    }

    // Driver Code
    public static void Main ()
    {
        int num1 = 13, num2 = 2 ;
        Console.Write( division(num1, num2));

    }
}

// This code is contributed by nitin mittal.

PHP

<?php
// CPP program to divide a number by other
// without using / operator

// Function to find division without using
// '/' operator

function division($num1, $num2)
{
    if ($num1 == 0)
        return 0;

    if ($num2 == 0)
        return INT_MAX;

    $negResult = false;

    // Handling negative numbers
    if ($num1 < 0)
    {
        $num1 = -$num1 ;

        if ($num2 < 0)
            $num2 = - $num2 ;
        else
            $negResult = true;
    }
    else if ($num2 < 0)
    {
        $num2 = - $num2 ;
        $negResult = true;
    }

    // if num1 is greater than equal to num2
    // subtract num2 from num1 and increase
    // quotient by one.
    $quotient = 0;
    while ($num1 >= $num2)
    {
        $num1 = $num1 - $num2 ;
        $quotient++ ;
    }

    // checking if neg equals to 1 then making
    // quotient negative
    if ($negResult)
            $quotient = - $quotient ;
    return $quotient ;
}

// Driver program
$num1 = 13; $num2 = 2 ;
echo division($num1, $num2) ;

// This code is contributed by ajit
?>

Javascript

<script>
// Javascript program to divide a number by other
// without using / operator

    // Function to find division without using
    // '/' operator
    function division( num1, num2)
    {
        if (num1 == 0)
            return 0;
        if (num2 == 0)
            return Number.MAX_VALUE;;
        let negResult = false;

        // Handling negative numbers
        if (num1 < 0)
        {
            num1 = -num1;
            if (num2 < 0)
                num2 = -num2;
            else
                negResult = true;
        }
        else if (num2 < 0)
        {
            num2 = -num2;
            negResult = true;
        }

        // if num1 is greater than equal to num2
        // subtract num2 from num1 and increase
        // quotient by one.
        let quotient = 0;
        while (num1 >= num2)
        {
            num1 = num1 - num2;
            quotient++;
        }

        // checking if neg equals to 1 then making
        // quotient negative
        if (negResult)
            quotient = -quotient;
        return quotient;
    }

    // Driver program
    let num1 = 13, num2 = 2;
    document.write(division(num1, num2));

// This code is contributed by gauravrajput1
</script>

Output

6

Time Complexity: O(num1/num2)
Auxiliary Space: O(1), As constant extra space is used.