Why a different output in these two loops?

Question

// why without () around n+"" in this loop "hi" is printed 100 times?:
int n = 100;
for (int i = 1; i <= n+"".length(); i++) {
System.out.println("hi");
}

// and with () around n+"" in this loop "hi" is printed 3 times:
int n = 100;
for (int i = 1; i <= (n+"").length(); i++) {
System.out.println("hi");
}

// why isn't n evaluated as a string in the first loop?

Answer 1

The first one is evaluated like this
n + ("".length()), the length of empty string is 0 so it's like 100 + 0. Well, you know how it's evaluated in the second one

Answer 2

It seems that method invocation has a higher precedence than addition. Would that be right Agent_I ?

Answer 3

Sonic
Certainly, the dot operator is evaluated before the addition

Answer 4

oh 😅, thank you Agent_I 😊