• Loops

    A loop in programming is like running around a track. When you start running, you keep going until you have gone around the track once. In programming, a loop is when you tell the computer to do the same thing over and over again until it has done what you told it to do. For example, if you want your computer to count from 1 to 10, it will create a loop that says "count 1, count 2, count 3" all the way up to 10.

      • For Loops

      • Php

        Example of for loop in php.
        <?php
for ($key = 1; $key < 4; $key++) {
	print($key); // 1, 2, 3
}

      • Javascript

        Example of for loop in javascript.
        for (var key = 1; key < 4; key++) {
	console.log(key); // 1, 2, 3
}

      • Python

        Example of for loop in python.
        for key in range(1, 4):
  print(key) # 1, 2, 3

      • Dart

        Example of for loop in dart.
        void main(){
  for (var key = 1; key < 4; key++) {
	  print(key); // 1, 2, 3
  }
}

      • Go

        Example of for loop in go.
        package main

import "fmt"

func main() {
	for key := 1; key < 4; key++ {
		fmt.Println(key)
	}
}

      • For ...in Loops

      • Php

        Example of for-in loop in php.
        <?php
$fruits = ['a' => 'apple', 'b' => 'banana', 'c' => 'cherry'];

foreach ($fruits as $key => $value) {
	print("$key: $value"); // a: apple etc.
}

      • Javascript

        Example of for-in loop in javascript.
        var fruits = {a: 'apple', b: 'banana', c: 'cherry'};

for (var key in fruits) {
	console.log(`${key}: ${fruits[key]}`); // a: apple etc.
}

      • Python

        Example of for-in loop in python.
        fruits = {'a': 'apple', 'b': 'banana', 'c': 'cherry'}

for key, value in fruits.items():
  print(f'{key}: {value}') # a: apple etc.

      • Dart

        Example of for-in loop in dart.
        void main {
  var fruits = {'a': 'apple', 'b': 'banana', 'c': 'cherry'};

  for (var key in fruits.keys) {
	  print('${key}: ${fruits[key]}'); // a: apple etc.
  }
}

      • Go

        Example of for-in loop in go.
        package main

import "fmt"

func main() {
	var fruits = map[string]string{"a": "apple", "b": "banana", "c": "cherry"}

	for key, value := range fruits {
		fmt.Println(key + ": " + value) // a: apple etc.
	}
}

      • While Loops

      • Php

        Example of while loop in php.
        <?php
$times = 1;

while($times <= 5){
	print("Looped $times"); // Looped 1 etc.
	$times += 1;
}

      • Javascript

        Example of while loop in javascript.
        var times = 1;

while(times <= 5){
	console.log(`Looped ${times}`); // Looped 1 etc.
	times += 1;
}

      • Python

        Example of while loop in python.
        times = 1

while times <= 5:
	print(f'Looped {times}') # Looped 1 etc.
	times += 1

      • Dart

        Example of while loop in dart.
        void main(){
  var times = 1;

  while(times <= 5){
	  print('Looped ${times}'); // Looped 1 etc.
	  times += 1;
  }
}

      • Go

        Example of while loop in go.
        package main

import "fmt"

func main() {
	var times int = 1

	for times <= 5 {
		fmt.Println("Looped", times) // Looped 1 etc.
		times += 1
	}
}