#include<stdio.h>

int main(){

int n,i;

int sum=0;

printf("Enter
the n i.e. max values of series: ");

scanf("%d",&n);

sum
= (n * (n + 1)) / 2;

printf("Sum of
the series: ");

for(i =1;i <=
n;i++){

if (i!=n)

printf("%d +
",i);

else

printf("%d = %d
",i,sum);

}

return 0;

}

**Sample output:**

Enter the n i.e. max values
of series: 5

Sum of the series: 1 + 2 + 3
+ 4 + 5 = 15

**Mathematical Formula:**

Sum of the series 1 + 2 + 3 + … + n = n (n+1)/2

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