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                            # while 型控制結構

Lua跟其他常見語言一樣，提供了while控制結構，語法上也沒有什么特別的。但是沒有提供do-while型的控制結構,但是提供了功力相當的[repeat](#)。while型控制結構語法如下：

~~~
x = 1
sum = 0
--求1到5的各數相加和
while x <=5 do
    sum = sum + x
    x = x + 1
end
print(sum)
~~~
> 運行輸出：15
                    
                
        
                
            
        
                
    
                
    
                
        
                
    
                

                







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