< > >= <= == != === !==
    ==与===的区别:==只进行值得比较,===类型和值同时相等,则相等

    1. var result = '55' == 55; // true
    2. var result = '55' === 55; // false 值相等,类型不相等
    3. var result = 55 === 55; // true
    1. var a = 1;
    2. var b = "1";
    3. console.log(typeof(a));//number
    4. console.log(typeof(b));//string
    5. console.log(a==b); //比较值是否相等
    6. console.log(a===b); //比较值和类型是否相等
    7. var k = (4 >= 6 || '人' != '阿凡达' && !(12 * 2 == 144) && true);
    8. console.log(k);
    9. /*
    10. var k = (4 >= 6 || '人' != '阿凡达' && !false && true);
    11. var k = (4 >= 6 || '人' != '阿凡达' && true && true);
    12. var k = (false || '人' != '阿凡达' && true && true);
    13. var k = (false || true && true && true);
    14. var k = (false || true && true);
    15. var k = (false || true);
    16. var k = true;
    17. */

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