[Solved] Why does my code return 1 always?

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Here’s the problem:

double math = 1/k;

and

formula2 -= 1/k;

k is an int variable, so the JVM won’t never return a decimal number in this statement. It will take only two possible values: 0 (if k > 1) or 1 (if k == 1) because the JVM performs the division before promoting the result to double.

Try this:

formula2 -= 1/(double)k;

Take a look at Numeric Promotions

solved Why does my code return 1 always?