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Why the output of the bellow expression is 2,1?
let a = 1
let b = 2
a = (b+=a -=b)-a
console.log(`${a,b}`)Answer
let a = 1 let b = 2 a = (b+=a-=b)-a (*) a-=b means a = a-b = 1-2 = -1 a = -1 Substitute into (*) => a = (b+=(-1))-a b+=(-1) means b=b + (-1) = b - 1 = 1 Substitute into (*) => a = (1)-a = 1-(-1) = 2 a=2 b=1
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