Answers for "how to use for...in javascript"

for in js

var colors=["red","blue","green"];
for(let col of colors){
  console.log(col);
}
// red
// blue
// green

for in js

//for ... in statement

const object = { a: 1, b: 2, c: 3 };

for (const property in object) {
  console.log(`${property}: ${object[property]}`);
}

// expected output:
// "a: 1"
// "b: 2"
// "c: 3"

for loop in javascript

for (i in things) {
    // If things is an array, i will usually contain the array keys *not advised*
    // If things is an object, i will contain the member names
    // Either way, access values using: things[i]
}

How do I use for-loops js

How for-loops work
A for loop has 3 parts
I will go the through the first section, than the third and than the second.

The first part is where we will start, in this case, I want to start at 0.
for(let index = 0;)
than we say every time the loop repeats how much does it add?
In this case Im using numbers and adding 1 each time. so I say:
for(let index = 0; index = index + 1)
And the final part when do we want the loop to stop?
  in this case I want it to stop at 10 so I will make my for-loop like this:
for(let index = 0; index < 10; index = index + 1)
Now I add the body to my for-loop
for(let index = 0; index < 10; index = index + 1) {
                     }
And now inside the body I run the command: console.log(index);
this will run the for-loop
for(let index = 0; index < 10; index = index + 1) {
console.log(index);     } //-> 0 1 2 3 4 5 6 7 8 9
It will run to 9 not 10 because it did run 10 times, but
the index started at 0 not 1

for loop in javacript

//first type
for(let i; i< number; i++){
  //do stuff
  //you can break
  break
}

//2nd type
const colors = ["red","green","blue","primary colors"]

colors.forEach((color) =>{
 //do stuff 
 //But you can't breack out of the loop
})

//3rd type might not be considered as a loop
  colors.map((color) =>{//do stuff
  //no bracking})