C Foundation

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What is Operator C Comma Operator C Arithmetic Operators C Relational Operators C Logical Operators C Bitwise Operators C Conditional Operators C : : Operator C Operator Priority

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Control Statements

What is Control Statement C if Statement C if else Statement C Nested if Statement C Else if Statement C Break Statement C Continue Statement C Switch Statement C Goto Statement


What is Control Loop C for Loop C Nested for Loop C while Loop C Nested while Loop C do while Loop C Nested do while loop


What is Function C User Defined Functions C Recursion C Passing Parameters


Scope C Local Scope C Global Scope

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What is Storage Class C Auto C Extern C Static C Register


What is Array C One Dimensional Array C Two Dimensional Array C Multi Dimensional Array C Arrays Of Strings


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What is Structure C Struct within Struct C Array within Structure C Pointer to Structure C Structure and Function C Enum C Bitfield Structure C Type def


What is Union


What is File C read a file C write a file C File Handling C Error Handling C Low Level Disk I/O C Other file functions

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What is Memory Allocation C Malloc() C Calloc() C Free() C Realloc() C Coreleft()

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The ones who are crazy enough to think they can change the world are the ones who do.
- Steve Jobs

C Multiplication Without Using Multiplication Operator

multiplication without using multiplication operator

In my college days my programming friend makes a rigorous challenge with me. He asked me to multiply two numbers without using multiplication operator, it's sounds poor right. Multiplication without using Multiplication operator is it possible for you?

You being a programmer, Impossible is nothing more than having two cups of coffee instead of a coffee, lets code a C program to multiply two numbers without using multiplication operator.

C Program - Without Using Multiplication Operator

#include <stdio.h>
int main()
int num1, num2, ans = 0;
printf("\nEnter any two integers : ");
scanf("%d %d ", &num1, &num2);
while(num2 != 0)
ans = ans + num1;
printf("Result = %d ", ans);
return 0;
Enter any two integers : 6 4 
Result : 24


The above program is crystal clear, Here while loop will iterate until num2 = 0; when num2 = 0 printf statement will print the value in a variable ans and returns 0.

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