日 - 循环练习

no = 1top = 5direction = 1while no>0:    print(no,end= ' ')    if no == top:        print(no,end=' ')        direction = -1    no = no + direction

1 2 3 4 5 5 4 3 2 1 

import randomsystem_no = random.randint(1,20)while true:    guess = int(input("enter the no. "))    if guess == system_no:        print("hurray!  i got the number!! ")        break    elif guess > system_no:        print("your guess is too high! ")    else:        print("your guess is too low! ")

enter the no. 15your guess is too low! enter the no. 17your guess is too low! enter the no. 19hurray!  i got the number!! 

no = int(input("enter no. "))max_no = 0while no>0:    rem = no%10    if rem>max_no:        max_no = rem    no//=10print(max_no)

enter no. 23577

no = int(input("enter no. "))min_no = 9while no>0:    rem = no%10    if rem<min_no:        min_no = rem    no//=10print(min_no)

enter no. 23572

if the number is even: n=n/2if the number is odd: n=3n+1.

def even_odd(no):    while no>0:        num=no%10        if num%2==0:            even=num/2        else:            odd=3*num+1        no=no//10    return even,oddno=int(input("enter the number:"))even,odd=even_odd(no)print("even number:",even)print("odd number:",odd)

Enter the number:12even number: 1.0odd number: 4