<!DOCTYPE html>
<html lang="en"><head><meta charset="UTF-8"><meta name="viewport" content="width=device-width, initial-scale=1.0"><title>逻辑运算符</title>
</head><body><script>// 逻辑与，一假则假console.log(true && true)console.log(false && false)console.log(3 < 5 && 3 > 2)//trueconsole.log(3 < 5 && 3 < 2)//falseconsole.log('-----------------------------------------------')// 逻辑或，一真则真console.log(true || true)//trueconsole.log(true || false)//trueconsole.log(false || false)//falseconsole.log('-----------------------------------------------')// 逻辑非，取反console.log(!true)//falseconsole.log(!false)//true</script>
</body></html>
练习：
<!DOCTYPE html>
<html lang="en"><head><meta charset="UTF-8"><meta name="viewport" content="width=device-width, initial-scale=1.0"><title>用户输入</title>
</head><body><script>// 1.用户输入let num = +prompt('请输入数字:')// 2.判断条件后弹出结果alert(num % 4 === 0 && num % 100 !== 0)</script>
</body></html>
运算符优先级：
