for-loop-javascript.js

// i += 1 is a shorter way of writing i = i + 1
for (i = 0; i < 5; i += 1)
{ // <-- the code block starts here
  // Console.log expects a string, not a number
  // so if we are going to log i we need to turn it into a string first
  // using the toString function of the number:
  let string_i = i.toString()
  // Now we can log i:
  console.log("Right now, i is " + string_i); 
} // <-- the code block ends here
            
console.log("Next Example!")

let ages = [16, 87, 33, 12];

// This time I'll use a different variable: j instead of i, just to show that you can.
// array.length gets the length (number of values) of an array
// so ages.length returns 4 because there are four numbers in ages, so this loop will run four times:
// which is perfect because there are only four ages to log:
for (j = 0; j < ages.length; j += 1)
{
  // Here we use j, which is the same j as the one above that keeps track of the index for the for loop
  // so it will increment by 1 every time this loop is run.
  // here we use j as the index for the age we want to retreive from the array ages:
  // and because j increments each time the loop is run, the next age will be logged each time.
  // like this: first age[0], then age[1], then age[2], then age[4].
  // First we need to turn the age, which is a number, into a string:
  let string_age = ages[j].toString()
  // And then we can log it:
  console.log(string_age)
}