python04-优快云博客

本文链接：https://blog.youkuaiyun.com/archsmart/article/details/87872529

本文介绍Python编程的基础知识，包括注释、字符串处理、缩进规范及变量定义。通过实例演示如何使用循环结构打印九九乘法表，适合初学者快速上手。

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单行注释 #
多行注释 ‘’’ ‘’’
msg=’’’ ‘’’ #多行打印
“ ’ “ ” " “ 单引号和双引号的意义是一样的
使用4个空格作为缩进

多行打印和单双引号

msg=’’‘Hello World!
hhhh
zzz’’’
print msg
print “hhhhhhhhhhh’kkkkkkk’zzzz”
print ‘dddddd"ddddd"ddddd’
print ‘’‘ssssrddd’ddd"ddd’’’

打印九九乘法表

num1=1
while num1<=9:
    num2=1
    while num2<=num1:
        if num2*num1>=10:
            print num2,"*",num1,"=",num2*num1,
        else:
            print num2,"*",num1,"=",num2*num1,"", 
        num2+=1
    num1+=1
    print ""

输出结果：

1 * 1 = 1
1 * 2 = 2  2 * 2 = 4
1 * 3 = 3  2 * 3 = 6  3 * 3 = 9
1 * 4 = 4  2 * 4 = 8  3 * 4 = 12 4 * 4 = 16
1 * 5 = 5  2 * 5 = 10 3 * 5 = 15 4 * 5 = 20 5 * 5 = 25
1 * 6 = 6  2 * 6 = 12 3 * 6 = 18 4 * 6 = 24 5 * 6 = 30 6 * 6 = 36
1 * 7 = 7  2 * 7 = 14 3 * 7 = 21 4 * 7 = 28 5 * 7 = 35 6 * 7 = 42 7 * 7 = 49
1 * 8 = 8  2 * 8 = 16 3 * 8 = 24 4 * 8 = 32 5 * 8 = 40 6 * 8 = 48 7 * 8 = 56 8 * 8 = 64
1 * 9 = 9  2 * 9 = 18 3 * 9 = 27 4 * 9 = 36 5 * 9 = 45 6 * 9 = 54 7 * 9 = 63 8 * 9 = 72 9 * 9 = 81