JavaScriptの演算子

code:javascript

A += B

A = A + B

A =+ B という演算子はない

code:javascript

A =+ B

A = (+B)

code:javascript

let A = 3

let B = 5

A + B … 8

A += B … 8

A =+ B … 5

code:javascript

null + 1 … 1

undefind + 1 … NaN