使用while語句造成無限循環錯誤

Question

我想知道爲什麼這是一個無限循環。

該腳本如下：

x=1; 
    while x<5; 
    x=2; 
    x=x+2; 
    if x==4; 
     x=x-1; 
    end 
    end 

Answer 1

通過這個步驟，看看爲什麼x將始終小於5：

x=1; 
while x<5; 
    x=2; // You set x to 2 at the beginning of every single iteration 
    x=x+2; // At this point, x == 4 
    if x==4; // The "if" is unnecessary - of COURSE x == 4 - how could it possibly be anything else? 
    x=x-1; // x now contains 3 
    end 
end 

在每次迭代，然後，X ==開始2.在迭代結束時，x == 3.