Python Learning Path (7)--while cycle

While loop

　　

1. Basic cycle

123456

while条件:         # 循环体    # 如果条件为真，那么循环体则执行    # 如果条件为假，那么循环体不执行

2. Break

Break to exit all loops

1234	whileTrue:    print "123"    break    print"456"

3, continue

Continue is used to exit the current loop and continue the next loop

1234	whileTrue:    print "123"    continue    print"456"

Exercises

1. Use while loop input 1 2 3 4 5 6 8 9 10

2. For all numbers of 1-100

3. All odd numbers in output 1-100

4. All even numbers in output 1-100

5, Beg 1-2+3-4+5 ... 99 of all numbers of the and

6. User Login (three chance retry)

1. Use while loop input 1 2 3 4 5 6 8 9 10
n = 1
While N < 11:
if n = = 7:
Pass
Else
Print (n)
n = n + 1

Print ('----end----')

2. For all numbers of 1-100
n = 1
s = 0
While N < 101:
s = s + N
n = n + 1

Print (s)

3. All odd numbers in output 1-100

n = 1
While N < 101:
TEMP = n 2
If temp = = 0:
Pass
Else
Print (n)
n = n + 1

Print ('----end----')

4. All even numbers in output 1-100

n = 1
While N < 101:
TEMP = n 2
If temp = = 0:
Print (n)
Else
Pass
n = n + 1

Print ('----end----')

5, Beg 1-2+3-4+5 ... 99 of all numbers of the and
n = 1
s = 0 # s is the sum of all previous numbers
While n < 100:
TEMP = n 2
If temp = = 0:
s = N-S
Else
s = s + N
n = n + 1

Print (s)

Python Learning Path (7)--while loop