js弱类型和强制转换类型测试题

console.log(1+“2”+“2”);
122

console.log(1<2<3);
true

console.log(1>2>3);
false

console.log(“A” - “B” + “2”);
NaN2

console.log(“A” - “B” + 2);
NaN

console.log(“A” - “B” );
NaN

true + ‘5’
true5

false + ‘5’
false5

-5.5+‘5’
-5.55

‘2’ + undefined
“2undefined”