Rebol3 Code Examplex

Rebol [
    title: "Rosetta code: Sign of an integer (signum)"
    file:  %Sign_of_an_integer_%28signum%29.r3
    url:   https://rosettacode.org/wiki/Sign_of_an_integer_%28signum%29
]

print sign? -10
print sign? 42
print sign? 0

-1
1
0