FizzBuzz

Generate it:

lumen --examples fizzbuzz

print 'N='
inputInt &x
repeat x, n
n = n + 1
if n % 15 == 0
    println 'FizzBuzz'
elif n % 5 == 0
    println 'Buzz'
elif n % 3 == 0
    println 'Fizz'
else
    println n
endif
endrepeat

The classic FizzBuzz, now written with modern Lumen loop and condition syntax:

• repeat x, n creates a loop that runs x times with an iterator n that starts at 0 (see Loops).
• Since the iterator starts at 0, we increment it to get 1-indexed counting: n = n + 1.
• % (modulo) checks divisibility, using elif chains instead of nested blocks (see Conditionals).

Note the divisibility-by-15 check runs first — this is the “check the most specific case first” trick FizzBuzz solutions need in any language, since 15 is also divisible by 3 and 5.

Scan into Android

See Lumen on Android for how the scan-and-run pipeline works.