if Statement

hi everyone,

i buy book me understand more advanced 2.0 concept , have quick question if statement. when use if, have use comparaison operator in parameter. why in below exemple didn’t? knows why? if use one, function don’t work properly. don’t understand why… help!

var tvpower:boolean = false;

function togglepower() {
var newchannel:number;
if (tvpower) {
changethechannel(0);
tvpower = false;
} else {
changethechannel(1);
tvpower = true;
}
}

it's shorthand boolean conditional statement.
written:

if (tvpower==true) {
changethechannel(0);
tvpower = false;
} else {
changethechannel(1);
tvpower = true;
}
}


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