python 基础学习系列（四）

FOR循环

for item in range(5,10,2): print(item)

prices =[10,20,30] total = 0 for price in prices: total += price print(f'Total:{total}')

numbers = [5,2,5,2,2] for x_count in numbers: print('x'* x_count)

numbers = [5,2,5,2,2] for x_count in numbers: output='' for count in range(x_count): output += 'x' print(output)

运行结果如下：

xxxxx xx xxxxx xx xx

找出最大的数

numbers=[3,6,2,8,4,10] max=numbers[0] for number in numbers: if number > max: max=number print(max)

列出矩阵中的所有项 matrix=[ [1,2,3], [4,5,6], [7,8,9] ] for row in matrix: for item in row: print(item)

二维数组 matrix=[ [1,2,3], [4,5,6], [7,8,9] ] for row in matrix: for item in row: print(item)

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