break

#!/usr/bin/python3

for letter in 'Python':     # 第一个示例
   if letter == 'h':
      break
   print ('Current Letter :', letter)

var = 10                    # 第二个示例
while var > 0:              
   print ('Current variable value :', var)
   var = var -1
   if var == 5:
      break

print ("Good bye!")

Current Letter : P
Current Letter : y
Current Letter : t
Current variable value : 10
Current variable value : 9
Current variable value : 8
Current variable value : 7
Current variable value : 6
Good bye!

#!/usr/bin/python3

no = int(input('any number: '))
numbers = [11,33,55,39,55,75,37,21,23,41,13]

for num in numbers:
   if num == no:
      print ('number found in list')
      break
else:
   print ('number not found in list')

any number: 33
number found in list

any number: 5
number not found in list