project-euler/Sidef/056 Powerful digit sum.sf

#!/usr/bin/ruby

# Author: Daniel "Trizen" Șuteu
# License: GPLv3
# Website: https://github.com/trizen

# Considering natural numbers of the form, a^b, where a, b < 100, what is the maximum digital sum?

# https://projecteuler.net/problem=56

# Runtime: 0.153s

var max = 0
var r = range(90, 99)

r.each { |i|
    r.each { |j|
        var sum = (i**j -> sumdigits)
        if (sum > max) {
            max = sum
        }
    }
}

say max