变量不耗尽javascript [英] Variable not depleting javascript

问题描述

您好！我正在创造一个你可以买口袋妖怪的游戏。当购买宠物小精灵时，我显然希望硬币变量可以通过口袋妖怪花费的硬币数来减少。但是，当我这样做时，硬币变量总是保持在1000并且当我购买宠物小精灵时不会掉落。这是按下按钮时使用的功能：

 function buymagikarp（）{
 if（coins> = 100）{
 swal（成功，你买了1个magikarp！，成功）; 
币 -  100; 
 pokemonchosen.push（Magikarp）; 
} else {
 swal（错误，余额不足，错误）; 
} 
} 

我的尝试：



我试图删除swal（）以查看警报是否弄乱了硬币变量。

解决方案

币 - 100 只计算值，但从不存储它。你的意思是：

币 -  =  100 ;  //  （相当于:)币=硬币 -  100;  

？

Hello! I am creating a game where you can buy pokemon. When the pokemon is bought, I obviously want the coins variable to drop by the # of coins the pokemon costs. However, when I do this, the coins variable always stays at 1000 and does not drop when I buy the pokemon. Here is the function that is used when onclick on a button:

function buymagikarp() {
  if(coins >= 100 ) {
    swal("Success", "You bought 1 magikarp!", "success");
    coins - 100;
    pokemonchosen.push("Magikarp");
  } else {
    swal("Error", "Not enough balance", "error");
  }
}

What I have tried:

I have tried to remove the swal("") to see if the alerts were messing up the coins variable.

解决方案

coins - 100 just calculates the value, but never stores it. Did you mean:

coins -= 100; // (equivalent of:) coins = coins - 100;

?

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