算术运算符

+ , - , * , / , % , ** , //

a,b = 3,10
print(b / a)
print(b % a)
print(b ** a)
print(b // a)

3.3333333333333335
1
1000
3

字符串运算

字符串可以与字符串相加或与正整数相乘,结果为多个字符串拼接成的新字符串
字符串不可以参与减和除运算

a = '2a'
b = '111'
print(a + b + a)
print(a * 3,b * 2)

# 字符串拼接
I = 'information'
M = 'management'
S = 'system'

specialty = 'information ' + M + ' system'
print(specialty)

specialty = f'information {M} system'
print(specialty)

specialty = 'information {M} system'.format(M=M)
# specialty = 'information {} system'.format(M)
print(specialty)

2a1112a
2a2a2a 111111
information management system
information management system
information management system