objects-and-arrays Quiz

I'll duplicate the code here so it's easier to refer to:

for ( var i=0; i < 3; i+=1) {
    console.log(fruits[i]);
}

Here is a more simple way of thinking of what the logic does when you are looping:

i = 0

Loop 1

• return "Apple" ( at index 0 )
• Loop complete, now make i + 1

• i = 1

• is i <3?

• true

Loop 2

• return "Banana" ( at index 1 )
• Loop complete, now make i + 1
• i = 2
• is i <3?
• true

Loop 3

• return "Orange" ( at index 2 )
• loop complete, now make i + 1

• i = 3

• is i < 3?

• i is not less than 3

• i is equal to 3

• return false

• don't execute next loop

*If the code stated that i <= 3 , then it would loop through again and return the 4th index. So actually, the code stops at 3.

aha, so the "loop-counting" starts at 1, but the place assigned starts counting at zero? (I'm speaking in noob-lingo here, am not fully conversant with the precise terminology yet)

Well, basically it comes down to the variable 'i' - which in this case is used as your counter.

When the first loop starts, i = 0 so it runs through the loop. The loops then prints the item at the array index 0 "Apple" ( since i=0 ). Before the end of the loop, you add + 1 to the i variable, making the i = 1

Then it checks to see if i < 3. At the start of the second loop, i = 1, so it runs through the loop. The loop then prints the item at the array index 1 "Banana" ( since now i = 1 ). Before the end of the loop, you add another +1 to the i variable, making the i = 2.

Then it checks to see if i < 3. At the start of the third loop, i = 2, so it runs through the loop. The loop then prints the item at the array index 2 "Orange" ( since now i = 2 ). Before the end of the loop, you add another +1 to the i variable, making the i = 3.

Then it checks to see if i < 3. At the start of the fourth loop, i = 3, so it returns a value of 'false' and doesn't execute the loop, and since this is the end of the program, it ends.

Does that clarify it a bit more? The loop continues to execute as long as i < 3.

Thanks very much Rhys. That makes sense.

You guys are so awesome!

Thank you Rhys for being so thorough :D

Best,

Elizabeth