廖雪峰 python学习打卡 Day1

Task1代码：
               a=input('please input the value of a\n');
               b=input('please input the value of b\n');
               print('a*b=',int(a)*int(b));
Task2代码：
            print(r''' 123
            456.789
            'Hello, world'
            'Hello, \'Adam\''
            r'Hello, "Bart"'
            ''');
            print( 'r\'\'\'Hello,\nLisa!\'\'\'');
Task3代码：

            # -*- coding: utf-8 -*-
            s1 = 72
            s2 = 85
            r = 100*(s2-s1)/s1
            print('%.1f%%' % r)
Task4代码：
            # -*- coding: utf-8 -*-
               L = [
                     ['Apple', 'Google', 'Microsoft'],
                     ['Java', 'Python', 'Ruby', 'PHP'],
                     ['Adam', 'Bart', 'Lisa']
                     ];
            for i in range(len(L)):
                     for j in range(len(L)):
                              print(L[j]);
心得体会：明白了三种最常用的编码格式的区别，Python程序编写一定要注重缩进。