javascript while loop giving different results in node and browser

Question

I am executing the following seemingly straightforward code

var number = 0;
while (number <= 12) {
    console.log(number);
    number = number + 2;  
}
         


        

Answer 1

If you slightly change your code:

CHROME

var number = 0;
while (number <= 12) {
    console.log("z" + number);
    number = number + 2;  
}

z0
z2
z4
z6
z8
z10
z12
14

You'll see that the 14 is not being printed by the loop. Rather, that is the end value of the expression when the loop finishes running and is printed by the console itself.

FIREFOX

while (number <= 12) {
    console.log("z" + number);
    number = number + 2;  
}

14
"z0"
"z2"
"z4"
"z6"
"z8"
"z10"
"z12"

In Firefox, it runs the entire loop, prints the result and then catches up with the console.