Python | Check if all elements in a List are same
Given a list, write a Python program to check if all the elements in given list are same.
Example:
Input: ['Geeks', 'Geeks', 'Geeks', 'Geeks', ] Output: Yes Input: ['Geeks', 'Is', 'all', 'Same', ] Output: No
There are various ways we can do this task. Let’s see different ways we can check if all elements in a List are same.
Method #1: Comparing each element.
# Python program to check if all # ments in a List are same def ckeckList(lst): ele = lst[0] chk = True # Comparing each element with first item for item in lst: if ele != item: chk = False break; if (chk == True): print("Equal") else: print("Not equal") # Driver Code lst = ['Geeks', 'Geeks', 'Geeks', 'Geeks', ] ckeckList(lst) |
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Output:
Equal
But In Python, we can do the same task in much interesting ways.
Method #2: Using all() method
# Python program to check if all # elements in a List are same res = False def chkList(lst): if len(lst) < 0 : res = True res = all(ele == lst[0] for ele in lst) if(res): print("Equal") else: print("Not equal") # Driver Code lst = ['Geeks', 'Geeks', 'Geeks', 'Geeks'] chkList(lst) |
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Output:
Equal
Method #3: Using count() method
# Python program to check if all # elements in a List are same res = False def chkList(lst): if len(lst) < 0 : res = True res = lst.count(lst[0]) == len(lst) if(res): print("Equal") else: print("Not equal") # Driver Code lst = ['Geeks', 'Geeks', 'Geeks', 'Geeks'] chkList(lst) |
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Output:
Equal
Method #4: Using set data structure
Since we know there cannot be duplicate elements in a set, we can use this property to check whether all the elements are same or not.
# Python program to check if all # elements in a List are same def chkList(lst): return len(set(lst)) == 1 # Driver Code lst = ['Geeks', 'Geeks', 'Geeks', 'Geeks'] if chkList(lst) == True: print("Equal") else: print("Not Equal") |
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Output:
Equal
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