Can someone pls explain how this code works and what's the answer?

Question

Fill in the blanks to print EVEN values from 0 to 20 using a for loop:

var x = 0;
for (; x <= _; x += _) {
document.write(x);
}

Answer 1

R. Krishna this is a simple "for loop" rather you use odd or even numbers
example:
var x=0;
for (;x<=5;x+=1){
document.write(x);
}
will print 012345