in python for usage (containing the break, continue, exit)

for usage:

for recycling syntax:

for 变量 in range(10):
         循环需要执行的代码

Presentation range of usage:

range of usage:

range(stop): 0~stop-1
range(start,stop): start~stop-1
range(start,stop,step): start~stop step(步长)

>>> range(5)
[0, 1, 2, 3, 4]
>>> range(10)
[0, 1, 2, 3, 4, 5, 6, 7, 8, 9]
>>> range(1,11)
[1, 2, 3, 4, 5, 6, 7, 8, 9, 10]
>>> range(1,11,2)
[1, 3, 5, 7, 9]
>>> range(0,11,2)
[0, 2, 4, 6, 8, 10]
>>>

Examples of presentation for usage:

for i in range(5):
    print(i)

#求1～100之间所有偶数之和
sum = 0
for i in range(2,101,2):
    sum += i
print(sum)

#求1～100之间所有奇数之和
sum1 = 0
for i in range(1,101,2):
   sum1 += i
print(sum1)

num = int(input('Num:'))
res = 1
for i in range(1,num + 1):
  res *= i
print('%d的阶乘为：%d' %(num,res))

Another method:

Exit cycle of three methods:

break: jump out of the entire cycle
continue: out of this cycle, the latter continue statements are not executed
exit: exit terminates the program

for i in range(10):
if i == 5:
      continue
      print(i) 
print('hello python')

for i in range(10):
if i == 5:
     break
     print(i) 
print('hello python')

for i in range(10):
      if i == 5:
          exit（）
          print(i) 
print('hello python')