/AN IMPLEMENTATION TO CALCULATE THE SUM OF SERIES OF...1 + (1+2) + (1+2+3) + (1+2+3+4)_ _ _ _ _ _ _(

//AN IMPLEMENTATION TO CALCULATE THE SUM OF SERIES OF...1 + (1+2) + (1+2+3) + (1+2+3+4)_ _ _ _ _ _ _(1+2+ _ _  +N)//

#include<stdio.h>

int main()

{

        int n,i,j,sum=0;

        printf("ENTER THE VALUE OF N:\n");

        scanf("%d",&n);

        for(i=1;i<=n;i++)//1st is for getting sum ..if n=3...then for i=1

                for(j=1;j<=i;j++)//2 loops will be operated..//2nd loop for getting sum again & again ..added to previous sum..//for i==1..j=1//then for i==2..j=1+2=3 //for i==3..then for j=1+2+3=7..//

                {

                        sum=sum+j;//for n=3;;;1+3+7==11;;;;

                        if(j!=n)

                                printf("%d + ",j);

                }

        printf("%d=%d\n",n,sum);//sum is printed again

        return 0;

}