"Learning Notes" Python Basic Tutorial Learning Notes

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03-python basis, if judgment

PrintOutput DataPrint("Hahahah")------>Hahahaha= 100Print(a)----->Direct printing of A's value a= 18Print("My age is%d years old."%a)------>my age is 18 years old.= 18 High= 178Print("My age is%d years, my height is%dcm"%(Age,high))#Note: The variables in% (Age,high) are sequential, that is, the value of age replaces the first%d, and high replaces the second%dPrint("aaaaaa", end="") output aaaaaa, but not newline name="Dongge"Print("My name is%s"%name) Input: UserName= Input ("Please enter user name:")------------------------------------------------------------Practice:#input information from the keyboard, and print the business card in a way to output#1. Prompt and get nameName = input ("Please enter your name:")#2. Tips and get contact informationTel = input ("Please enter your phone number:")#10086 number, "10086" string#3. Prompt and get addressaddr = input ("Please enter company address:")#4. Output InformationPrint("=======================")Print("Name:%s"%name)Print("phone Number:%s"%Tel)Print("Company Address:%s"%addr)Print("=======================") Money+ =------> Equivalent to Money = money+100 Money*= 3--------> Money = Money * 3A= 11A*= 3+4-6------->a = a*3+4-6---->a = 11*3+4-6---->of the wrong------->a = A * (3+4-6)---->a = 11* (3+4-6)---"Correct a= Int (" -")----"Put the string" -"a value of 100 (integer) that becomes an integer determines the statement:ifconditions: When the conditions are met, do things 1 when the conditions are met, do things 2 when the conditions are met, do things 3 when the conditions meet, do things 4ifcondition: When the condition is met, the thing to doElse: When the condition is not satisfied, the thing to do

04-python base-if, while, for, etc.

ifwhen judging a condition, if multiple conditions are being judged together, then a logical operator is required and-----> andor----->ornon-(take reverse)---> notifCondition 1 andCondition 2: Condition 1 and Condition 2 are satisfied, do things 1 condition 1 and Condition 2 are satisfied, do things 2 ... Wait a minute... Summary: Mode 1:ifConditions: Things to do when conditions are met 1 conditions to meet when the things to do 2 conditions meet when the things to do 3 .... Wait Way 2:ifConditions: Things to do when conditions are met 1 conditions to meet when the things to do 2 conditions meet when the things to do 3 .... WaitElse: Things to do when conditions are not met 1 conditions do not meet when the things 2 conditions do not meet the things to do 3 way 2:ifcondition 1: Condition 1 is satisfied when doing things 1 condition 1 satisfies the thing to do 2 condition 1 satisfies the thing to do 3 .... WaitelifCondition 2: Condition 2 do things when satisfied 1 conditions 2 do things when satisfied 2 conditions 2 things to do when satisfied 3elifCondition 3: Condition 3 do things when satisfied 1 conditions 3 do things when satisfied 2 conditions 3 things to do when satisfied 3Else: Condition 1,2, 3 are not satisfied with the case of the default execution of things, (note else can be no, according to the actual function to determine) if the condition 1 is satisfied, then the execution condition 1 is satisfied when the thing done, after the completion, the following conditions 2, 3 will not be executed, but directly end the entire if statement if the condition 1 is not satisfied, Then to determine whether the condition 2 is satisfied, if the condition 2 is satisfied, then the execution condition 2 is fulfilled when the code executes, and then ends the entire if statement if the condition 1, 2 is not satisfied, then the condition 3, if the condition 3 is satisfied, then the execution condition 3 is fulfilled, then the entire if statement endsifxxxx:yyyyyyyifXxxxx2:yyyyyyy2 Method 1 for repeating code execution:Print("dear, I was wrong, please forgive me ....")Print("dear, I was wrong, please forgive me ....")Print("dear, I was wrong, please forgive me ....")Print("dear, I was wrong, please forgive me ....")Print("dear, I was wrong, please forgive me ...."Method 2 To repeat code execution:ifconditions: When conditions are met, things to do whileconditions: Things to do when the condition is met note the point:1What exactly is the condition while,,, , Tip: Find the code that needs to be executed repeatedly, and then on the condition while you can2. How many times is it executed? ,,, Little tricks: Look at demand, in the case of unclear requirements, do not know exactly how many times, then use whileTrue3. I= 1 whilei<=10:        Print("haha")

"Learning Notes" Python Basic Tutorial Learning Notes