将布尔值转换为整数[重复]

Question

我想知道为什么

recommendation=false;
var val = "Bipin " + recommendation?1:0;
console.log(val);

返回

1

但是

recommendation=false;
var x=recommendation?1:0;
var val = "Bipin " + x;
console.log(val);

打印

Bipin 0

谁能解释这种行为？

Answer 1

"Bipin " + recommendation?1:0; 

被解释为

("Bipin " + recommendation)?1:0

在这种情况下

"Bipin " + recommendation(is always truthfully)

因此结果始终为 1

like @Qantas 94 Heavy 指出这是您需要做的运算符优先级问题

 "Bipin " + (recommendation?1:0);