Pure Programmer
Project: Sign Function
Write a function that takes an integer and computes the sign of the value. The function should return -1 if the argument is negative, +1 if it is positive and 0 if it is zero.
Output
$ javac -Xlint SignFunction.java
$ java -ea SignFunction
sign(5) : 1
sign(-5) : -1
sign(0) : 0