javaScript

Question

var x=1;
if(x) {x=0;}
if(x) {x=1;}
document.write(x);

i just learn Javascript. but i dont understood this exercise.after write in the editor i get some results but i dont understood logic. who can expalin this?

Answer 1

@ValentinHacker:

Your answer disrupt me... Booleans are not ( True=1 and False=2 ) but 0 is equivalent to False, and other values equivalent to True, isn't it?

Well, this code:

document.write("test<br>");
for (var i=0; i<3; i++) {
if (i) {document.write(i+"<br>");};
}

output:

test
1
2

...

[ EDIT ]
and negative values also equivalent to True

Answer 2

Booleans: True != 0, False = 0
The "if" conditions are satisfied because statements return true so last value of x will be 1.

Answer 3

Oops! yes, typo mistake (corrected)....