Looping :

It's a way to loop through particular list of data in order to get the result at the end. Loops will run till the condition turns out to be false. We have for, while and do while.

I have curated 5 loops that you can find almost every single day.

1. For Loop

1. You have to intialize the loop with a variable ie: i = 1;
2. You have apply the condition ie: <, >, ≤ , ≥
3. Increment the value / decrement the value in order to get repetition.

Syntax:

for (statement 1; statement 2; statement 3) {
  // code block to be executed
}

// INSTEAD OF WRITING SAME CODE 10 TIMES
console.log(REP -1) 
console.log(REP -2) 
console.log(REP -3) 
console.log(REP -4) 
console.log(REP -5) 
console.log(REP -6) 
console.log(REP -7) 
console.log(REP -8) 
console.log(REP -9) 
console.log(REP -10)

// WE CAN DO SOMETHING LIKE THIS 👇🏻
for (let rep = 1; rep <= 10; rep++) {
    console.log(`REP - ${rep}`);
}

Loop inside a loop 🔁 :

for (let excercise = 1; excercise < 4; excercise++) {
    console.log(` --- Starting Exercise - ${excercise}`);
    for (let rep = 1; rep <= 5; rep++) {
        console.log(` Excercise ${excercise}  REP - ${rep} 🏋🏼‍♀️`);
    }
}

2. The For In Loop

The JavaScript for in statement loops through the properties of an Object and arrays.

Do not use for in over an Array if the index order is important. It is better to use a for loop, a for of loop, when the order is important.

Syntax:

for (key in object) {
  // code block to be executed
}