What types of loops exist in JavaScript and how do…

In JavaScript, the following main types of loops exist:

for: Executes a block of code a certain number of times. Used when the number of iterations is known. Consists of three optional expressions: initialization, condition, and final expression.
```
for (let i = 0; i < 5; i++) {
  // Loop body
  console.log(i);
}
```
while: Executes a block of code as long as the specified condition is true. Used when the number of iterations is unknown in advance.
```
let i = 0;
while (i < 5) {
  // Loop body
  console.log(i);
  i++;
}
```
do...while: Similar to while, but the condition is checked after the loop body is executed. Guarantees that the loop body is executed at least once.
```
let i = 0;
do {
  // Loop body
  console.log(i);
  i++;
} while (i < 5);
```

for...in: Iterates over the enumerable properties of an object. Iterates over the object's keys.

const obj = { a: 1, b: 2, c: 3 };
for (const key in obj) {
  // Working with key and value: obj[key]
  console.log(`${key}: ${obj[key]}`);
}

for...of: Iterates over the values of iterable objects (such as arrays, strings, Map, Set). Iterates over the values.
```
const arr = [1, 2, 3];
for (const value of arr) {
  // Working with value
  console.log(value);
}
```
forEach (array method): Executes a provided function once for each array element. Not a traditional control loop in syntax, but performs the same task of iterating over elements.
```
const arr = [1, 2, 3];
arr.forEach(function(value, index, array) {
  // Working with value, index, and array reference
  console.log(`${index}: ${value}`);
});
```

What types of loops exist in JavaScript and how do they work?