how to write a for loop in js code example

Example 1: javascript for loop

var colors=["red","blue","green"];
for (let i = 0; i < colors.length; i++) { 
  console.log(colors[i]);
}

Example 2: javascript for loop

for (let count = 0; count < 90; count++) {
	// ...
}

Example 3: loop javascript

for(let i = 0; i < arr.length; i++){

}

Example 4: javascript for loop

// for loop keeps running while condition is TRUE
for (let rep = 1; rep <= 10; rep++) {
   console.log(`Lifting weights repetition ${rep}`);
}