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Max van den Berge
6,506 Pointswhat is the reason that if you type true it prints out "the condition is true" and with false it prints out "the conditi
what is the reason that if you type true it prints out "the condition is true" and with false it prints out "the condition is false". I know he said it, but WHY does it prints out true or false. if i put in a number , then i also get a true response. and if i put in random letters i get a false. WHY is that so? could anyone explain this to me, whit a view more words? love to hear from you!
if (5) { console.log('The condition is true.'); } else { console.log('The condition is false.'); } ---> true
if (qwerty) { console.log('The condition is true.'); } else { console.log('The condition is false.'); } ---> false
if (false) { console.log('The condition is true.'); } else { console.log('The condition is false.'); } --> false
2 Answers
Steven Parker
231,141 PointsThe "if" expression is converted into a Boolean (true or false) value if it is not one already. Several rules apply to how things get converted. Any number other than zero is converted to "true", but 0 is considered "false".
When you put "random letters" you are creating a variable name. If the variable has not been previously created, this should cause an error in most JavaScript systems. But if yours allows it, another rule says that anything that is undefined converts to "false".
Max van den Berge
6,506 Pointsthank you so much. i understaind it now !