TestFunctions
distSq(3,4) = 25
millionX(-3) = -3000000
>>> 25
>>> 100
>>> 25
distSq(3,4,10) = 125
>>> 123456789
dist(3,40) = 37
dist(120,10) = 110
abs(-100) = 100
abs(100) = 100
sgn(20) = 1
sgn(-20) = -1
sgn(0) = 0
 sum of a[] is 2038
Adding an array of 2000000 elements = 3. Sum is 6000000
Java's way -- 170 milliseconds
My way -- 770 milliseconds