How to round up to the next integer?

No, Math.ceil() won’t work on its own because the problem occurs earlier. a and b are both integers, so dividing them evaluates to an integer which is the floor of the actual result of the division. For a = 3 and b = 2, the result is 1. The ceiling of one is also one – hence you won’t get the desired result. You must … Read more

JavaScript exponents

There is an exponentiation operator, which is part of the ES7 final specification. It is supposed to work in a similar manner with python and matlab: Now it is already implemented in Edge14, Chrome52, and also it is available with traceur or babel.

Java Round up Any Number

Math.ceil() is the correct function to call. I’m guessing a is an int, which would make a / 100 perform integer arithmetic. Try Math.ceil(a / 100.0) instead. Outputs:

1e-9 or -1e9, which one is correct?

Neither is more correct than the other. They just represent different values. 1e-9 is 0.000000001; the minus sign applies to the exponent. -1e9 is -1000000000.0; the minus sign applies to the number itself. The e (or E) means “times 10-to-the”, so 1e9 is “one times ten to the ninth power”, and 1e-9 means “one times ten to the negative ninth power”. In mathematical scientific notation, this … Read more

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