第五天Python学习记录

Posted 2020-10-21 xudachen

while循环

#第50次不打印，第60-80次打印对应值的平方

 1 count = 0
 2 
 3 while count <= 100:
 4     if count == 50:
 5         pass
 6     elif count >= 60 and count <=80:
 7         print(count*count)
 8     else:
 9         print("loop ",count)
10 
11     count += 1
12 
13 print("------loop is ended-------")

 

Dead Loop(死循环)

count = 0

while True:#True本身就是真


    print("forever-------",count)
    
    count += 1

break 用于完全结束一个循环，跳出循环体执行魂环后面的语句 continue 只是终止本次循环，接着执行后面的循环

count = 0

while count <= 100:
    print("loop ",count)
    if count == 5:
        break

    count += 1

print("------out of loop-------")

count = 0

while count <= 100:
    print("loop ",count)
    if count == 5:
        continue

    count += 1

print("------out of loop-------")

0-100循环，跳过6到94

count = 0

while count <= 100:
    count += 1
    if count > 5 and count < 95:
         continue

    print("loop ",count)


print("------out of loop-------")