The Python for loop and while loop

format for statement 
for x in range (start value, end value, the stride) 
　　execute the statement 
output 0,100 individual numbers 
for I in Range (0,101) 
　　Print (I) 
output of 0,100 even 
for i in range (0,101,2) 
　　print (i) 
output a sum of the values 
a = [ '. 1', '2', '. 3'] 
for I in a: 
　　print (i) 
while sentence format 
while Analyzing formula: 
　　execute statement 
output 0,100 each number 

i = . 1 
the while I <= 100: 
　　Print (I) 
　　I + =. 1 
. 1 title: number of Penta

　 f=0
　 c=0
　 for i in range(1,101):
　 　　f=i*(3*i-1)/2
　 　　print('%-5.2d '%(f),end="")
　 　　c=c+1
　 　　if(c%10==0):
　　　 　　print('\n')

Several input number to 0 to end, and a mean value is calculated

Positive_number=0
negative_number=0
s=0
i=0
num=int(input('请输入数： '))
while num!=0:
    if num>0:
        Positive_number=Positive_number+1
        i=i+1
    elif num<0:
         negative_number=negative_number+1
          i=i+1
    s=s+num
    num=int(input('请输入数： '))
print(Positive_number,negative_number,s/i)