# Python Program to Left Rotate a List by n

Write a Python program to left rotate a list by n times or positions. In this example, we sliced the list using the position and combined it using arithmetic +.

```ltList = [5, 10, 15, 20, 25, 30, 35, 40, 45, 50]

ltRotate = int(input("Enter Position to Left Rotate List Items = "))

print('Original List Items Before Left Rotating')
print(ltList)

list2 = ltList[ltRotate:] + ltList[:ltRotate]

print('\nFinal List Items After Left Rotating')
print(list2)```

This Python program uses the for loop to left rotate the list elements by the user given position.

```ltList = [11, 22, 33, 44, 55, 66, 77, 88]

ltRotate = int(input("Enter Position to Left Rotate List Items = "))

print('Original List Items Before Left Rotating')
print(ltList)

for i in range(ltRotate):
firstValue = ltList
for j in range(len(ltList) - 1):
ltList[j] = ltList[j + 1]
ltList[len(ltList) - 1] = firstValue

print('Final List Items After Left Rotating')
print(ltList)```
``````Enter Position to Left Rotate List Items = 6
Original List Items Before Left Rotating
[11, 22, 33, 44, 55, 66, 77, 88]
Final List Items After Left Rotating
[77, 88, 11, 22, 33, 44, 55, 66]``````

This example allows the user to enter the list size, items, and rotation number, and left rotate the list items by a given number.

```def printListItems(ltList):
for i in range(len(ltList)):
print(ltList[i], end = '   ')

ltList = []
ltListTot = int(input("Total Number of Left Rotate List Items = "))

for i in range(1, ltListTot + 1):
ltListvalue = int(input("Please enter the %d List Item = "  %i))
ltList.append(ltListvalue)

ltRotate = int(input("Enter Position to Left Rotate List Items = "))

print('\nOriginal List Items Before Left Rotating')
printListItems(ltList)

for i in range(ltRotate):
firstValue = ltList
for j in range(len(ltList) - 1):
ltList[j] = ltList[j + 1]
ltList[len(ltList) - 1] = firstValue

print('\nFinal List Items After Left Rotating')
printListItems(ltList)```
``````Total Number of Left Rotate List Items = 7
Please enter the 1 List Item = 30
Please enter the 2 List Item = 40
Please enter the 3 List Item = 50
Please enter the 4 List Item = 70
Please enter the 5 List Item = 90
Please enter the 6 List Item = 120
Please enter the 7 List Item = 180
Enter Position to Left Rotate List Items = 2

Original List Items Before Left Rotating
30   40   50   70   90   120   180
Final List Items After Left Rotating
50   70   90   120   180   30   40   ``````

This Python program will help to left rotate a list by n using a while loop.

```def printListItems(ltList):
i = 0
while i < len(ltList):
print(ltList[i], end = '   ')
i = i + 1

ltList = []
ltListTot = int(input("Total Number of Left Rotate List Items = "))
i = 1
while i <= ltListTot:
ltListvalue = int(input("Please enter the %d List Item = "  %i))
ltList.append(ltListvalue)
i = i + 1

ltRotate = int(input("Enter Position to Left Rotate List Items = "))

print('\nOriginal List Items Before Left Rotating')
printListItems(ltList)

i = 0
while i < ltRotate:
firstValue = ltList
j = 0
while j < len(ltList) - 1:
ltList[j] = ltList[j + 1]
j = j + 1
i = i + 1
ltList[len(ltList) - 1] = firstValue

print('\nFinal List Items After Left Rotating')
printListItems(ltList)```
``````Total Number of Left Rotate List Items = 8
Please enter the 1 List Item = 23
Please enter the 2 List Item = 45
Please enter the 3 List Item = 67
Please enter the 4 List Item = 98
Please enter the 5 List Item = 89
Please enter the 6 List Item = 11
Please enter the 7 List Item = 16
Please enter the 8 List Item = 87
Enter Position to Left Rotate List Items = 3

Original List Items Before Left Rotating
23   45   67   98   89   11   16   87
Final List Items After Left Rotating
98   89   11   16   87   23   45   67``````