Output from the script contains the range from 10 till 14 as we have defined start as 10 and stop as 15. Next we will use range to define start and stop: #!/usr/bin/env python3 for val in range( 10, 15): The range function starts at zero if a start point is not defined as with this form of the function call. The range(5) class basically tells the function to generate numbers from 0 to 5, but not including 5. So in such case it is important that we always use a break statement in the success condition so that the loop doesn't execute else block: Raise ValueError("1 or 5 not found in mylist") ValueError: 1 or 5 not found in mylistĪs you see, even though 1 and 5 are part of the list, the else block was executed which raised ValueError. Output from this script: ~]# python3 for-loop-5.py Now the script has executed properly but this is not correct as fortunately one of the if conditions inside the for loop failed and ValueError was raised but what if both the if condition were success, let's check that out: #!/usr/bin/env python3Įlse: raise ValueError( "1 or 5 not found in mylist") Raise ValueError("10 not found in mylist") ValueError: 10 not found in mylist
#PYTHON FOR LOOP CODE#
The loop contrasts and differs from a while statement in that in a for loop, the repeated code block is ran a predetermined number of times, while in a while statement, the code is ran an arbitrary number of times as long as a condition is satisfied.įound 5 in mylist Traceback (most recent call last):
A for loop is used when you have a block of code that you would like to execute repeatedly a given number of times. This is due to its unique syntax that differs a bit from for loops in other languages. The for loop in Python is also referred to as the for…in loop. In general for loops are for iterating over a collection. Example-10: Use Python for loop to list all files and directories.Example-9: Use pass statement with Python for loop.Example-8: Use continue statement with Python for loop.Example-7: Use break statement with Python for loop.Example-5: Python for loop with range() function.Example-4: Python for loop with else statement.Example-3: Python for loop with dictionary.List of Python Data Types which are iterable.
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