loop.md

Loops

While loop

A while loop will continue executing a task / list of tasks until the condition becomes false.

    let i = 0;
    while (i <= 50) {
        i++;
    }

    say i;

For loop

A for-loop can be used to iterate over different objects. A good use for a for-loop is to iterate over every object in a list.

    let list = [1, 2, 3, 4];

    for (let i = 0; i < list.size(); i++) {
        say list.at(i);
    }

For each

A for-each loop can be used to iterate through objects and automatically assign them to a variable for you to work with.

    let list = [1, 2, 3, 4];

    for (item : list) {
        say item;
    }

For each map

A for-each map loop can do the same as the regular for each loop, just it allows for both keys and values at the same time.

    let map = {"key1" : "val1", "keeey2" : "vallll2"};

    for (keyItem, valItem : map) {
        say "Key: " + keyItem;
        say "Value: " + valItem;
    }

Small warning with both of the for-each loops. The current solution to an issue is to forcefully create the temporary variable used by the for-each loop. Then it will delete it from the scope once it is done. This means, if you use the same variable name you used elsewhere. You will need to redefine it after using a for-each loop as it will be unknown to the system now.

This is why we recommend using a unique variable name in the for-each loop.