Python Basic introduction （ A full set of nanny level tutorials ）

Chapter one

Section 11 ： Loop statement while

It can make our code execute repeatedly
while loop :

 while  Conditions :
     Code 

The process : Judge whether the condition is true , If it's true , Execute code . Then judge the condition again . … Until the condition is false and the loop ends

Dead cycle

`while True:  #  Dead cycle 
    print(" Spray you to death ")

Use the program to count , from 1~100

i = 1
while i <= 100:
    print(i)
    i = i + 1

1+2+3+4+5+6+7+8+9…+100 = ?

i = 1
s = 0
while i <= 100:
    print(i)
    print(s)  #  from 1  To  100  No number of 
    s = s + i   #  Add up 
    i = i + 1