Write a program in C, C++ to calculate

If you are familiar with the concept of loop in programming then you can easily solve this problem. In one of my programming i have explained how to find sum of n natural numbers using recursion.

Suppose if user has entered

Program to Calculate Sum of Digits of a Number.

1. Use for loop to calculate the sum.

Program to Count Number of Words in a Sentence by Taking Input from User.

2. You can also calculate the sum of n numbers, using mathematical formula

So if number is 10 then sum of number is 10 * 5 = 55

C,C++ Interview Questions.

Sum of n Odd Numbers.

The sum of n number is : 55

**sum of n numbers**using iterative approach.If you are familiar with the concept of loop in programming then you can easily solve this problem. In one of my programming i have explained how to find sum of n natural numbers using recursion.

Suppose if user has entered

**number 10**. So we have to calculate the sum of first 10 numbers. Sum of 10 numbers is 55.Program to Calculate Sum of Digits of a Number.

### Logic to Calculate the Sum of n Numbers

1. Use for loop to calculate the sum.

for(i=1;i<=num;i++){ sum +=i; }

Program to Count Number of Words in a Sentence by Taking Input from User.

2. You can also calculate the sum of n numbers, using mathematical formula

**n(n+1)/2**.So if number is 10 then sum of number is 10 * 5 = 55

C,C++ Interview Questions.

### Program to Calculate the Sum of n Numbers

In this approach we calculate the sum of n numbers using mathematical formula (Sum of n numbers).#include <stdio.h> void main() { int n,sum; printf("Enter the value of n"); scanf("%d",&n); sum = (n*(n+1))/2; printf("The sum of n number is %d",sum); }

## Calculate Sum of n Numbers using For Loop

#include <stdio.h> int main(void) { int n,sum=0,i; printf("Enter the value of n"); scanf("%d",&n); /* Iterate from 1 to n . */ for(i=1;i<=n;i++) { sum = sum + i; } printf("The sum of n number is %d",sum); return 0; }

Sum of n Odd Numbers.

**Output:****Enter the value of n : 10**

The sum of n number is : 55

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