Python conditional statements and basic data types

First, if the use of several information

1. If basic statement

If 1==1:    print (' OK ')  #缩进四个字符, you can press the TAB key else:    print (' Error ')  

If 1 = = 1: Print ('    A1 ') print ('    A2 ') print (' End ')  

2.if nesting

if1 = = 1:    if2 = = 2:        Print('A1')        Print('A2')    Else:        Print('A3')Else:    Print('A4')

3.if elif

INP = input ('Please input INP:')ifINP = ='A1' :    Print('B1')elifINP = ='A2':    Print('B2')elifINP = ='A3':    Print('B3')Else:    Print('B4')

4. Use pass to represent the empty code, meaningless, only to represent the code block

if 1 = =1    :passelse        :print(' A1 ')

II. Basic data types

1. String (symmetric quotation marks, format not unique)

Addition:

n1="Alex"n2='nb'n3=n1+n2  Print(n3)

>> output is ALEXNB

Multiplication:

' Alex ' n2=n1*3print(n2)

>> output is Alexalexalex

2. Digital

Addition: +

Subtraction:-

Multiplication: *

Division:/

exponentiation: * *

Residual:% >> can be used to determine odd even

A = input ("' = a% 2if temp = = 0    :print (' C9>a is a evennumber ')else:    print (' A is a odd number ')

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Python conditional statements and basic data types