Multiply two numbers without using multiplication(*) operator

Problem statement:- Program to compute Multiply two numbers without using multiplication(*) operator

 Data requirement:-

   Input Data:- a1,a2

  Output Data:-sum

  Additional Data:-i

Program in C

Here is the source code of the C Program to Multiply two numbers without using the multiplication(*) operator.

Code:

#include<stdio.h>
int main()
{
int a1,a2,sum=0,i;
            
            // Get the two number
printf("Enter the two numbers :\n");
scanf("%d %d",&a1,&a2);

//compute the multiplication

for(i=1;i<=a1;i++)
{
sum=sum+a2;
                    }
                    //Display multiplication value
        printf("The multiplication of %d and %d is %d \n",a1,a2,sum);

}

Input/Output:
Enter the two numbers :
4
5
The multiplication of 4 and 5 is 20

Program in C++

Here is the source code of the C++ Program to Multiply two numbers without using the multiplication(*) operator.

Code:

#include<iostream>
using namespace std;
int main()
{
int a1,a2,sum=0,i;

cout<<"Enter the two numbers :\n";
cin>>a1;
cin>>a2;

for(i=1;i<=a1;i++)
{
sum=sum+a2;
                    }
        cout<<"The multiplication of "<<a1<<" and "<<a2<<" is "<<sum;
}

Input/Output:
Enter the two numbers :
3
9

The multiplication of 3 and 9 is 27

Program in Java

Here is the source code of the Java Program to Multiply two numbers without using the multiplication(*) operator.

Code:

import java.util.Scanner;
public class P4 {

public static void main(String[] args) {
Scanner cs=new Scanner(System.in);
int a1,a2,sum=0,i;

System.out.println("Enter the two numbers :");
a1=cs.nextInt();
a2=cs.nextInt();

for(i=1;i<=a1;i++)
{
sum=sum+a2;
                }
    System.out.println("The multiplication of "+a1+" and "+a2+" is "+sum);
cs.close();
}
}

Input/Output:
Enter the two numbers :
4
10

The multiplication of 4 and 10 is 40

Program in Python

Here is the source code of the Python Program to Multiply two numbers without using the multiplication(*) operator.

Code:

num1=int(input("Enter the First numbers :"))
num2=int(input("Enter the Second number:"))
sum=0
for i in range(1,num1+1):
    sum=sum+num2
print("The multiplication of ",num1," and ",num2," is ",sum)

Input/Output:
Enter the two numbers :
4
5
The multiplication of 4 and 5 is 20

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