If you put 2 in the answer

Question

the output will be 02468101214161820 if you use the number 2 in the code:
var x = 0;
for (; x <=20; x +=2) {
document.write(x);
}

someone help me to understand it

Answer 1

Each value of x is written on the screen as you put the code "document.write (x);" within the FOR Loop.
To fix this, just get it out of the for loop:

var x = 0;
for (; x <= 20; x + = 2) {

}
document.write (x);
Output: 22

Hope it helps.

Answer 2

Why we must puts 2, not 4 or 5? Me Ask for sololearn example...
x += _

Answer 3

the reason for 2 is because the question asks that "even" numbers are printed only. So 0, 2, 4...etc. Your starting variable (initialization) is 0, this then is to be incremented or increased by 2 so long as the condition (is less than or equal to 20) is true which is why your variable increments as follows: x+=2 (same as x = x + 2)
So for example you start at x = 0 (0 is printed), next x = 0 + 2, x now becomes 2

Answer 4

x = 0

while

x <=20

:

print

(x)
x += 2

Answer 5

because you write document.write(x);
}
INSIDE your loop

Answer 6

hello guys. I am sorry but I don't understand why not 3 or 4 or 5...
0 3 6 9 12 15 18 .... ! why would not it be good ?
Thanks.

Answer 7

same question