python--judgment, Loop statement

Simple Judgment statement:If ...

A judgment statement:if... else ...

Multiple judgment statements:if elif else ...

Score=input ("Please enter your score")

Score=int (Score)

If score<60:

Print ("unqualified grades")

Elif 60<=score<80:

Print ("score is good")

Elif 80<=score<90:

Print ("score is excellent")

Else

Pass

If statement execution has a feature, it is judged from the top down, if it is true on a certain judgment, the sentence

When the corresponding statement is executed, the remaining elif and else are ignored.

Loop statement:

For x in ...

for loop, Traverse ....

Example : Forx in list

For x in range ()

Range() function

Can generate a sequence of functions, starting from zero

list (range) is a 0 -to-one listing

For I in range (len,-1,-1)

python--judgment, Loop statement