return，break，continue 区别（详细例子）

我就是我 2022-05-14 09:16 221阅读 0赞

form：[https://zhidao.baidu.com/question/1958192745292032580.html][https_zhidao.baidu.com_question_1958192745292032580.html]

return 会直接另函数返回，函数就运行结束了，所有该函数体内的代码都不再执行了，所以该函数体内的循环也不可能再继续运行。

如果你需要让循环继续执行，就不能return函数，而应该选用break或者continue。

> break：跳出所在的当前整个循环，到外层代码继续执行。
> 
> continue：跳出本次循环，从下一个迭代继续运行循环，内层循环执行完毕，外层代码继续运行。
> 
> **return：直接返回函数，所有该函数体内的代码（包括循环体）都不会再执行。**

#coding=gbk
    #这是测试使用的代码模块
    def return_continue_break(type):
        if(not type in ["return", "continue", "break"]):
            print('"type" should be "return, continue, break".')
            return
        for j in range(0, 5):
            for i in range(0, 5):
                print('j_i:%d, %d'%(j, i))
                if(i > 3):
                    if(type == "return"):
                        return
                    elif(type == "continue"):
                        continue
                    else:
                        break
                print("executed!")
     
    if __name__ == '__main__':
        return_continue_break("break")
        return_continue_break("continue")
        return_continue_break("return")

备注：上述代码在双层循环间运行： if i == 3 : 语句，在执行continue 和 break 时， 两者的区别比较明显。

运行：return\_continue\_break("break")

j_i:0, 0
    executed!
    j_i:0, 1
    executed!
    j_i:0, 2
    executed!
    j_i:0, 3
    executed!
    j_i:0, 4
    j_i:1, 0
    executed!
    j_i:1, 1
    executed!
    j_i:1, 2
    executed!
    j_i:1, 3
    executed!
    j_i:1, 4
    j_i:2, 0
    executed!
    j_i:2, 1
    executed!
    j_i:2, 2
    executed!
    j_i:2, 3
    executed!
    j_i:2, 4
    j_i:3, 0
    executed!
    j_i:3, 1
    executed!
    j_i:3, 2
    executed!
    j_i:3, 3
    executed!
    j_i:3, 4
    j_i:4, 0
    executed!
    j_i:4, 1
    executed!
    j_i:4, 2
    executed!
    j_i:4, 3
    executed!
    j_i:4, 4

运行：return\_continue\_break("continue")

运行：return\_continue\_break("return")

j_i:0, 0
    executed!
    j_i:0, 1
    executed!
    j_i:0, 2
    executed!
    j_i:0, 3
    executed!
    j_i:0, 4

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