號井號不加在一起

Question

我有這兩個領域正從我的API傳遞

Var1 = £23.45 
Var2 = £67.89 

如何我在jQuery的一起添加這些？

我已經試過

+Var1 + +Var2 

但所有我得到的回報是NaNNaN。

Answer 1

就目前而言，它們是無效的。如果你希望他們加入，你需要做的是這樣的：

Var1 = "£23.45"; // Put it inside quotes. And give a semicolon. 
Var2 = "£67.89"; // Put it inside quotes. And give a semicolon. 

現在：

Var3 = "£" + (parseFloat(Var1.substr(1)) + parseFloat(Var2.substr(1))); // £91.34 

現在Var3將之和再加上£標誌：£91.34。

Var1 = "£23.45"; // Put it inside quotes. And give a semicolon. 
 
Var2 = "£67.89"; // Put it inside quotes. And give a semicolon. 
 
Var3 = "£" + (parseFloat(Var1.substr(1)) + parseFloat(Var2.substr(1))); // £91.34 
 
document.write(Var3);

可以使用.toFixed(2);格式化小數位：

Var1 = "£23.45"; // Put it inside quotes. And give a semicolon. 
 
Var2 = "£67.85"; // Put it inside quotes. And give a semicolon. 
 
Var3 = "£" + (parseFloat(Var1.substr(1)) + parseFloat(Var2.substr(1))).toFixed(2);; // £91.34 
 
document.write(Var3);

PS：https://stackoverflow.com/questions/35061784/what-does-nan-stand-for-in-javascript/