python学习-10 运算符1，,1.加+，减-，乘*

python学习-10 运算符1，,1.加+，减-，乘*

1.加+，减-，乘*，除/

例如：

a = 1b = 2c = a + bprint(c)

运算结果：

3Process finished with exit code 0

a = 1b = 2c = a - bprint(c)

运算结果：

-1Process finished with exit code 0

a = 1b = 2c = a * bprint(c)

运算结果：

2Process finished with exit code 0

a = 1b = 2c = a / bprint(c)

运算结果：

0.5Process finished with exit code 0

2.特殊的 幂 **， 取余%，//取商

例如：

a = 1b = 2c = a ** bprint(c)

运算结果：

1Process finished with exit code 0

a = 9b = 2c = a % bprint(c)

运算结果：

1Process finished with exit code 0

a = 9b = 2c = a // bprint(c)

运算结果：

4Process finished with exit code 0

3.in 和 not in 表示判断

判断某个东西是否在**里

例如：

in

name = ‘abd‘        #‘abd‘  字符串  ； ‘a‘ 字符if ‘a‘ in name:     #   如果a在name里    print(‘ok‘)else:    print(‘error‘)

运行结果：

okProcess finished with exit code 0

ps:

子字符串：

name = ‘abd‘        #‘abd‘  字符串  ； ‘a‘ 字符#‘bd‘  子字符串或者叫子序列if ‘ad‘ in name:     #   如果a在name里    print(‘ok‘)else:    print(‘error‘)

运行结果：

errorProcess finished with exit code 0

not in:

name = ‘abd‘if ‘a‘ not in name:    print(‘ok‘)else:    print(‘error‘)

运行结果：

errorProcess finished with exit code 0

python学习-10 运算符1