loop

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Syntax

loop(n, expr)
loop(n, expr, exit)

Evaluates expression expr, n number of times. expr receives _ system variable indicating the iteration.

loop(5, game_tick())  => repeat tick 5 times
list = []; loop(5, x = _; loop(5, list += [x, _] ) ); list
// double loop, produces: [[0, 0], [0, 1], [0, 2], [0, 3], [0, 4], [1, 0], [1, 1], ... , [4, 2], [4, 3], [4, 4]]

In this small example we will search for first 10 primes, apparently including 0:

check_prime(n) -> !first( range(2, sqrt(n)+1), !(n % _) );
primes = [];
loop(10000, if(check_prime(_), primes += _ ; if (length(primes) >= 10, break())));
primes
// outputs: [0, 1, 2, 3, 5, 7, 11, 13, 17, 19]

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