I have a code , for a program which calculate a sum of a n numbers, but this is having a little catch, for the n=4, the would be like this,sum=1\*2+1\*2\*3+1\*2\*3\*4.I've started with a for, but suddenly the output is nearly to the reality, but still far:)). I don't want to be the target of programmer jokes :)). So help me understand the concept behind this ...I'm still far away from the answer.