将两个变量相加? [英] Adding two Variables together?

问题描述

尝试将两个整数变量加在一起，但是，我似乎无法弄清楚，因为它只是将它们作为字符串连接?

Trying to add two integer variables together, however, I can't seem to figure it out as it just joins them as strings?

var age_child = 10;
var age_gap = 10
alert(age_child+age_gap);

结果:1​​010，想要的结果:20

Result: 1010, Want Result: 20

推荐答案

var age_child = parseInt(10);
var age_gap = parseInt(10);

alert(age_child+age_gap); // should now alert 20

澄清一下，在这个确切的例子中，不需要执行 parseInt.但是，我假设您的代码中也没有 10，而是变量.

To clarify, in this exact example it is not required to do parseInt. However, I assumed you didn't exactly have 10 in your code either and they're instead variables.

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