Write a C Program to Find Sum of N Numbers | C Programming Examples

C Program to Calculate Sum of N Numbers | C Programming Examples

Write a C program for Sum of N Numbers. How to Print Sum of N Numbers in C programming. Logic for Sum of N Numbers in C program.

C Programming Examples:

1. Write a C Program to Calculate Sum of N Numbers

2. C program to Find Sum of N Numbers

3. How to Print Sum of N Numbers in C Programming

C Program to Calculate Sum of all Digits :

#include<stdio.h>
int main()
{
  int i,n,sum=0;
  printf("Enter a number:\n");
  scanf("%d",&n);
  for(i=0;i<=n;i++)
  {
    sum=sum+i;
  }
  printf("%d\n",sum);
}

Output: 

Enter a number:

10

55

Explanation of Calculate Sum of all Digits in C Programming :

First we initialized i,n, and sum which is declared as zero.

A number is given by user (say 5).

Now the logic is:

                sum=sum+i

                sum=0+0=0

for next iteration i becomes '1' so sum=0+1=1

for next iteration i becomes '2' so sum=2+1=3

for next iteration i becomes '3' so sum=3+3=6

for next iteration i becomes '4' so sum=4+6=10

for next iteration i becomes '5' so sum=10+5=15

for next iteration i becomes '6' which is not less than or equal to 'n'(i.e 5 as we took a value for explanation) then the loop terminates and goes to the next line.

Then the value of sum which is '15' will be printed.

Finally print the result. 

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