If i write "40"+20+30 what is his output. second i write 20+30+"50" what is his output . 3 statement i write 20-"40"+60 output

Question

this is concatenation operator. JavaScript question

Answer 1

The output of "40"+20+30 is 4050
The output of 20+30+"50" is 5050
The output of 20-"40"+60 is 40

Answer 2

402030
5050
40

Answer 3

1. 402030
2. 5050
3. Error

Answer 4

first concat sign is( +)sign if I doing - that's means it is not concatenation operator thanks for answers