Foreach statement

import ballerina/io;

public function main() {
    float v1 = sum([10.5, 20.5, 30.5]);
    float v2 = sum2([10.5, 20.5, 30.5]);
    io:println("v1:", v1, " v2:", v2);
}

function sum(float[] v) returns float {
    float r = 0.0;
    // `foreach` statement can be used to iterate an `array`.
    // Each iteration returns an element in the `array`.
    foreach float x in v {
        r += x;
    }

    return r;
}

function sum2(float[] v) returns float {
    float r = 0.0;
    // `m ..< n` creates a value that when iterated over will give the
    // integers starting from `m` that are `< n`.
    foreach int i in 0 ..< v.length() {
        r += v[i];
    }

    return r;
}

Foreach statement

The foreach statement iterates over an iterable value, by binding a variable to each member of the iterable value in order. foreach also works for strings, and will iterate over each character of the string.

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Function values

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While statement

import ballerina/io;

public function main() {
    float v1 = sum([10.5, 20.5, 30.5]);
    float v2 = sum2([10.5, 20.5, 30.5]);
    io:println("v1:", v1, " v2:", v2);
}

function sum(float[] v) returns float {
    float r = 0.0;

    foreach float x in v {
        r += x;
    }

foreach statement can be used to iterate an array. Each iteration returns an element in the array.

    return r;
}

function sum2(float[] v) returns float {
    float r = 0.0;

    foreach int i in 0 ..< v.length() {
        r += v[i];
    }

m ..< n creates a value that when iterated over will give the integers starting from m that are < n.

    return r;
}

bal run foreach_statement.bal
v1:61.5 v2:61.5