# A Beginner's Guide to JavaScript Loop

Loops are statements that repeat an action for a specified number of times. they enable you to execute a block of code repeatedly until a certain condition is met.

### The `for` Loop

### Syntax:

```javascript
for (initialization; condition; increment/decrement ) {
    //code to be executed
}
```

for loop consists of initialization, conditions, and increment/decrement.

**the Initialization:** is assigned to a variable e.g. ( i = 0 ).

the condition is decisions for the loop to run e.g. (i must be less than 5).

while increment/decrement increases (i++) or decreases (i--) each time the code block in the loop is executed.

`for` loops are commonly used to run code a set number of times. Also, you can use `break` to exit the loop early, before the `condition` expression evaluates to `false`.

### Example

Interate through integers from 0-4

```javascript

for ( i = 0; i < 5; i++ ) {
    console.log("print: " + i);
}

//Output
//print: 0
//print: 1
//print: 2
//print: 3
//print: 4
```

Use `break` to exit out of a `for` loop before `condition` is `false`:

```javascript

for ( i = 0; i < 5; i++ ) {
    if(i == 2) {
        break;
    }
    console.log("print: " + i);
}

//Output
//print: 0
//print: 1
//print: 2
```

### The `while` Loop

### Syntax:

```javascript
while (condition) {
    //code to be executed
}
```

This loop through a block of code as long as the condition is true.

```javascript


example;

let i = 0;
while ( i < 5 ) {
    console.log("The number is " + i);
    i++
}

//Output 
//The number is 0
//The number is 1
//The number is 2
//The number is 3
//The number is 4
```

### `do while` Loop

### Syntax:

```javascript
do {
    //code to be executed
} 
while (condition);
```

This executes the block of code once before checking if the condition is true, then it will repeat the loop as long as the condition is true.

```javascript

example;

do {
    console.log("The number is " + i);
    i++
}
while (i < 5);

//Output 
//The number is 0
//The number is 1
//The number is 2
//The number is 3
//The number is 4
```

### Conclusion

in conclusion, loops in programming especially JavaScript, are essential for executing a set of instructions repeatedly. They provide ways to automate tasks, iterating over data structure, objects, and arrays.

Thank you for reading.

References.

[MDN Documentation](https://developer.mozilla.org/en-US/docs/Learn/JavaScript/Building_blocks/Looping_code)

[w3Schools Documentation](https://www.w3schools.com/js/js_loop_for.asp)