Python study notes (c): branching and looping

Chapter IV branching and looping

Ternary operator

a = x if条件 else y

Affirmation

assert (), when the keyword behind the condition is false, the program throws an exception.

for loop

for expression in the target \ list
loop

>>> fa = "fishc"
>>> for each in fa:
	print(each,end = " ")

	
f i s h c

range()

range ([start,] stop [ , step = 1])
generates a start parameter value starting from the digital value to the end stop parameter.
If the range () passing only a number, such as 5, the production of all numbers from 0 to 5 (but not including 0 5)

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


	
0
1
2
3
4

Pass two parameters

>>> for i in range(2,9):
	print(i)

	
2
3
4
5
6
7
8

Passes three parameters

>>> for i in range(1,10,2):
	print(i)

	
1
3
5
7
9

break statement

Terminate the current cycle, out of the loop body.

continue Statement

Terminate the current round of the cycle and the beginning of the next cycle