Luffy Learning City-python Development Training--the first chapter

Tag: Play hat error will lap + = info Oge while loop

1 language: Explanatory language, different from Java compiler

2 History of development

3 Installation

Win all the way next, configure the environment variables to verify that the installation is successful

4 variables and their variables function, range

1) Name: With numbers, letters and underscores.

2) cannot start with a number,

3) Avoid using System keywords

5 interaction

Input statement

Name = input ("what isyour name? ") "  = Int (input ("How old is? ") "  = input ("What isyour job? ") "  "'==========info of%s=========name:%sage:%sjob:%s========end ======='" %(name,name,age,job)print(info)

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6 Type: Number, String, Boolean type, formatted output, operator

1) All default input is a string

2) Even if the number is also defaulted to a string, cast, such as the plus type such as the number int (5), float (6)

3) view type (variable name)

4) Boolean types are classified as true or false, with, or, non-

5) print ((%s,%s), (name,age)) Note one by one correspondence

7 Statement Control---If

1Name = input ("What is your name?")2Sex = input ("Boy or girl?")3age = Int (input ("How is old is you ?"))4 5 ifSex = ='Girl':6     ifAge <28:7         Print("I like girl")8     Else:9         Print("brother and sister Love is also very good oh")Ten Else: One     Print("Togerther come on")

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8 Statement Loop while

Times =0 whileTimes <= 3: Guess_number= Int (Input ("Please enter a score:"))    ifguess_number>100:        Print("input error, out of")    elifGuess_number >= 90:        Print("level: A")    elifGuess_number >= 80:        Print("level: B")    elifGuess_number >= 60:        Print("Rating: C")    elifGuess_number >= 40:        Print("level D")    Else:        Print("E") Times+ = 1

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9 dead Loop

 while True:     Print (" yo, really dead cycle oh ")

10 Jumping out of the loop break,continue difference

Replace break and continue in the following code to perform a view of the execution effect

Count = 0 while Count <=:    print(    count)if count = = 5:        continue    + = 1print("")

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Break ends the current loop and proceeds to the next code

Continue jumps out of the current loop, does not execute the following statement, jumps to the current loop body and executes a new loop from the condition judge

While--else

The else function behind the while loop is to execute the ELSE statement when it is not aborted by a break in the middle of the normal execution.

Replace break and continue in the following code to perform a view of the execution effect

Count = 0 while count < 5:    Print(count)    +=1    if Count = = 3:        breakElse    :print ("  Loop normal ")    print("")

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Luffy Learning City-python Development Training--the first chapter