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[英]I am trying to make a calculator in Javascript. But it is not working somehow
[英]I am trying to create a calculator with javascript.
我可以从用户处获得输入,并且可以将它们全部求和,但它会重新调整NaN。
我的代码:
var input1 = prompt("input 1","0");
var operation = prompt("operation","+");
var input2 = prompt("input 2","0");
var ans = (input1 + intput2);
if (operation = "+")
{
document.write("input1 + intput 2 = " + ans);
}
else
{
document.write("Other operations coming soon!");
}
此代码段中有几个问题。
+
号 intput2
有一个错字。 在应该我input2
。 ==
或===
验证。 operation = "+"
只是分配值 var input1 = prompt("input 1", "0"); var operation = prompt("operation", "+"); var input2 = prompt("input 2", "0"); var ans = (+input1 + +input2); if (operation == "+") { document.write("input1 + intput 2 = " + ans); } else { document.write("Other operations coming soon!"); }
提示返回字符串,因此您需要使用parseFloat()
将字符串转换为数字,然后检查var ans
中input2
的拼写。
var input1 = prompt("input 1", "10"); var operation = prompt("operation", "+"); var input2 = prompt("input 2", "2"); var ans = parseFloat(input1) + parseFloat(input2); if (operation = "+") { document.write("input1 + intput 2 = " + ans); } else { document.write("Other operations coming soon!"); }
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