S= 1*2 + 2*3 + 3*4 + ……..+ n * (n+1) solve the equation [ loop series ]
#include<stdio.h>
#include<conio.h>
#include<math.h>
int main(int argc, char const *argv[])
{
int x,n,i;
float m,c,y,sum=0;
printf("enter the value of n :");
scanf(" %d",&n);
for ( i = 1; i <= n; i++)
{
y=i*(i+1);
printf(" %f",y);
sum=sum+y;
}
m=sum;
printf("\nsum of series = %f",m);
return 0;
}
output :
enter the value of n :8
2.000000 6.000000 12.000000 20.000000 30.000000 42.000000 56.000000 72.000000
sum of series = 240.000000
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