Multiplication using recursion in c





C code to multiply two numbers by recursion:

#include<stdio.h>

int multiply(int,int);

int main(){

    int a,b,product;
    printf("Enter any two integers: ");
    scanf("%d%d",&a,&b);

    product = multiply(a,b);

    printf("Multiplication of two integers is %d",product);

    return 0;
}

int multiply(int a,int b){

    static int product=0,i=0;

    if(i < a){
         product = product + b;
         i++;
         multiply(a,b);
    }

    return product;
}

Sample output:

Enter any two integers: 5 8
Multiplication of two integers is 40

C code to multiply two numbers without using recursion:

#include<stdio.h>

int multiply(int,int);

int main(){

    int a,b,product;
    printf("Enter any two integers: ");
    scanf("%d%d",&a,&b);

    product = multiply(a,b);

    printf("Multiplication of two integers is %d",product);

    return 0;
}

int multiply(int a,int b){

    int product =0,i=0;

    while(i < a){
         product = product + b;
         i++;
    }

    return product;
}





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