Write a program to compute the sum of the first n terms of the following series S=1+2+3-4+5.......

Question

Please help me to to find the answer

Answer 1

Try it by yourself first, then show us your attempt so I can help you

Answer 2

Did you mean 1+2+3+4+5...?
I'm not sure about the pattern of the series if it's 1+2+3-4+5... instead.