JavaScript | 자바스크립트 | 'FOR' LOOPS IN JAVASCRIPT

JavaScript | 자바스크립트 | 'FOR' LOOPS IN JAVASCRIPT

Introduction to 'For' Loops in JS | Codecademy

For loops are one of the most commonly used bits of code - it's so powerful and so useful!

One. For loops: The Basics

1/13 Why use for loops?

File1 _ script.js

console.log("1");
console.log("2");
console.log("3");
console.log("4");
console.log("5");

2/13 First for loop

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// Example of a for loop:

for (var counter = 1; counter < 11; counter++) {

console.log(counter);

}

3/13 Starting the for loop

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for (var i = 5; i < 11; i = i + 1){
console.log(i);

}

4/13 Ending the for loop
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for (var i = 4; i < 24; i = i + 1) {
console.log(i);

}

5/13 Controlling the for loop
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for (var i = 5; i < 51; i+=5) {
console.log(i);

}

Two. Practicing loops!
6/13 How does it work?
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for (var i = 8; i < 120; i+= 12) {
console.log(i);

}

7/13 Practice counting down
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for (var i = 10; i >= 0 ; i--) {
console.log(i);

}

8/13 Last practice for loop
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for (var i = 100; i > 0; i -= 5) {
    console.log(i);    

}

Three. Arrays and Loops
9/13 Meet arrays
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var junk = ["JONE", "STUDIO", 3, 5];

console.log(junk);

10/13 Array positions
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var junkData = ["Eddie Murphy", 49, "peanuts", 31];

console.log(junkData[3]);

11/13 Loops and arrays I
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var cities = ["Melbourne", "Amman", "Helsinki", "NYC", "SEOUL", "TOKYO", "BUSAN", "ILSAN"];

for (var i = 0; i < cities.length; i++) {
    console.log("I would like to visit " + cities[i]);

}

12/13 Loops and arrays II
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var names = ["J", "O", "N", "E", "S"];
for (var i=0; i<names.length; i++) {
    console.log("I know someone called " + names[i]);

}

13/13 Conclusion
File1 _ script.js

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