pythagorean triples

triangles.hs

triangles = [(a,b,c) | a<-[1..], b<-[1..a-1], c<-[a..a+b], a^2+b^2==c^2]

main = putStr $ unlines $ map show triangles

triangles.js

function* range(a, b) {
    while (a <= b) {
        yield a;
        a++;
    }
}

function* triangles() {
    for (a of function* () {
        var c = 0;
        while (true) {
            c++;
            yield c;
        }
    }()) {
        for (b of range(1, a-1)) {
            for (c of range(a, a+b)) {
                if (a**2 + b**2 == c**2) {
                    yield [a, b, c];
                }
            }
        }
    }
}

for (t of triangles()) {
    console.log(t);
}

triangles.php

<?php

function triangles() {
    foreach ((function () {
        $c = 0;
        while (true) {
            $c++;
            yield $c;
        }
    })() as $a) {
        foreach (range(1, $a) as $b) {
            foreach (range($a, $a+$b) as $c) {
                if ($a**2 + $b**2 == $c**2) {
                    yield [$a, $b, $c];
                }
            }
        }
    }
}

foreach (triangles() as $t) {
    echo "(".$t[0].",".$t[1].",".$t[2].")\n";
}

triangles.py

triangles = ((a,b,c) for a in (i for i, _ in enumerate(iter(int, 1))) for b in range(1,a) for c in range(a,a+b+1) if a**2+b**2==c**2)

for x in triangles:
    print(x)