YouTipC Examples Sum Natural Numbers
# C Example - Sum of Natural Numbers
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Natural numbers are numbers that represent the count of objects, starting from 0, i.e., 0, 1, 2, 3, 4, ..., one after another, forming an infinite set, referring to non-negative integers.
## Example - Using for
#includeint main(){int n, i, sum = 0; printf("Enter a positive integer: "); scanf("%d",&n); for(i=1; i<= n; ++i){sum += i; // sum = sum+i;}printf("Sum = %d",sum); return 0; }
## Example - Using while
#includeint main(){int n, i, sum = 0; printf("Enter a positive integer: "); scanf("%d",&n); i = 1; while(i<=n){sum += i; ++i; }printf("Sum = %d",sum); return 0; }
Output:
Enter a positive integer: 100Sum = 5050
## Example - Using recursion
#includeint addNumbers(int n); int main(){int num; printf("Enter an integer: "); scanf("%d", &num); printf("Sum = %d",addNumbers(num)); return 0; }int addNumbers(int n){if(n != 0)return n + addNumbers(n-1); else return n; }
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