Why won't this summation function work

[ilovechess]

i got it now thanks

[helios]

Change the 1 in the dividend to 1.0. Otherwise you're just performing an integer division.

[coder777]

You have two integer division (without digits after the decimal point).

Means: for all k > 0 the result of the formula on line 9 is 0. Change to:

answer += ( (1.0 / ( 2*k + 1)) ); // with .0 it is a floating point operation instead of integer