Write a program to display the sum of n numbers where n is given by the user in c code example

Example 1: c program to find the sum of given number

# include<stdio.h>
int main
{
int number;
int sum=0;
int remainder;
printf("enter a number\n");
scanf("%d",&number);
for(;number!=0;)
{
remainder=number%10;
sum=sum+remainder;
number=number/10;
}
printf("sum of digits=%d",sum);
}

Example 2: sum of n natural numbers in c

int addNumbers(int n)
{
    int count, sum = 0;

    for(count=1; count <= n; count++)
    {
        sum = sum + count;
    }
  
    return sum;
}