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VisualizaçõesWhy does Banana is printing in JavaScript?
Today I was trying random letters printing using nodejs, Somehow I tried to print 'banana' in log but unfortunately I miss n (letter) to log but still it works fine. Why does it prints whole banana instead of 'baaa'?
('b' + 'a' + + 'a' + 'a').toLowerCase();
The output is banana but why? Even if + + (empty char) generates NaN then still it should print bananaa not just banana.
Screenshot:
3 Respostas
Responde à pergunta0
The extra + acts as a unary operator on the following 'a', and tries to coerce it to a number, resulting in NaN. The remaining + symbols are all interpreted as string concatenation which causes NaN to be coerced to string ie. ('b' + 'a' + + 'a' + 'a') = ('b' + 'a' + NaN + 'a') = ('baNaNa').
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Interesting !!
console.log(('b' + 'a' + + 'a' + 'a').toLowerCase());
console.log(('b' + 'a' + + 'a' + 'a'));
console.log(( 'a' + + 'b' ));
//output
banana
baNaNa
aNaN
In the 3rd statement, the 'b' is not printed as + + 'b' = NaN //not a number and
.toLowerCase() makes it nan hence the word banana
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Since you are adding nothing with nothing, which is most likely returning NaN