











C Program to Find the Sum of First N Natural Numbers


Find the Sum of first N Natural Numbers
A Natural number is a same as Counting number.They are used to Count the numbers of real physical object. Natural number is start from 1 and go on infinite. The positive numbers 1, 2, 3… are known as natural numbers.
Example:
Natural number={1,2,,4,5,6,…….}.
Formula for Sum of First N natural numbers is : n(n+1)/2.
If you want to add first 5 Natural number then we find the Sum of 1+2+3+4+5 =15.
Working
- Step 1. Start
- Step 2. Enter a number (N).
- Step 3. Use formula to calculate the sum of N natural number || Sum=(n*(n+1))/2.
- Step 4. Print sum of N Natural Number.
- Step 5. Stop
C Code
#include<stdio.h>
int main()
{
int sum = 0, n;
printf(“Enter the first N Natural Number\n“);
scanf(“%d”,&n);
sum=(n*(n+1))/2;
printf(“sum is %d”,sum);
return 0;
}
Output
Enter the first N Natural Number : 7
Sum is 28
- Positive or Negative number: C | C++ | Java
- Even or Odd number: C | C++ | Java
- Sum of First N Natural numbers: C | C++ | Java
- Sum of N natural numbers: C | C++ | Java
- Sum of numbers in a given range: C | C++ | Java
- Greatest of two numbers: C | C++ | Java
- Greatest of the Three numbers: C | C++ | Java
- Leap year or not: C | C++ | Java
- Prime number: C | C++ | Java
- Prime number within a given range: C | C++ | Java
- Factorial of a number: C | C++ | Java
- Sum of digits of a number: C | C++ | Java
- Reverse of a number : C | C++ | Java
- Palindrome number: C | C++ | Java
- Armstrong number : C | C++ | Java
- Armstrong number in a given range : C | C++ | Java
- Fibonacci Series upto nth term : C | C++ | Java
- Factorial of a number : C | C++ | Java
- Power of a number : C | C++ | Java
- Factor of a number : C | C++ | Java
- Strong number : C | C++ | Java
- Perfect number : C | C++ | Java
- Automorphic number : C | C++ | Java
- Harshad number : C | C++ | Java
- Abundant number : C| C++ | Java
- Friendly pair : C | C++ | Java

