I thought 0 in boolean expression is true but here, the code gives an error, why? And why is the output of the second program 0?

Question

//first program
var value = 0;
if(value) {
return true;
}
else {
return false;
}

//second program
var count = 0;
for(var i=0; i<3; i++) {
for(var j=0; j<=2; j++) {
continue;
count++;
}
}
document.write(count);

Answer 1

0 is usually false.

Answer 2

1. "The Boolean value of 0 (zero), null, undefined, empy string is False".
https://www.sololearn.com/learn/JavaScript/1129/

2. The "continue" statement breaks one iteration in the loop and continues with the next iteration.

In other words, "count++;" is always skipped.

Answer 3

Diego so js is kinda like Ruby, Ruby treats every object except false and nil as true..yeah i think so it goes

Answer 4

Diego, I still don't get why it gives 0

Answer 5

Mofey At the beginning, "count" equals 0. Since "count++;" is always skipped, its value remains as 0.

Answer 6

Diego what if "break;" was put in place "continue;" will the output still be 0? And also, I still don't understand why the output of the first program throws an error and not either false or true

Answer 7

this does not apply in javascript, values for boolean must be true or false. btw 0 means false in the other languages like c,c++ etc not true

Answer 8

Yes