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Python program to find largest number in a list

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  • Difficulty Level : Easy
  • Last Updated : 26 Jul, 2022
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Given a list of numbers, the task is to write a Python program to find the largest number in given list. Examples:

Input : list1 = [10, 20, 4]
Output : 20

Input : list2 = [20, 10, 20, 4, 100]
Output : 100

Method 1 : Sort the list in ascending order and print the last element in the list. 

Python3




# Python program to find largest
# number in a list
 
# list of numbers
list1 = [10, 20, 4, 45, 99]
 
# sorting the list
list1.sort()
 
# printing the last element
print("Largest element is:", list1[-1])

Output

Largest element is: 99

Method 2 : Using max() method 

Python3




# Python program to find largest
# number in a list
 
# list of numbers
list1 = [10, 20, 4, 45, 99]
 
 
# printing the maximum element
print("Largest element is:", max(list1))

Output

Largest element is: 99

Method 3 : Find max list element on inputs provided by user 

Python3




# Python program to find largest
# number in a list
 
# creating empty list
list1 = []
 
# asking number of elements to put in list
num = int(input("Enter number of elements in list: "))
 
# iterating till num to append elements in list
for i in range(1, num + 1):
    ele = int(input("Enter elements: "))
    list1.append(ele)
     
# print maximum element
print("Largest element is:", max(list1))

Output:

Enter number of elements in list: 4
Enter elements: 12
Enter elements: 19
Enter elements: 1
Enter elements: 99
Largest element is: 99

Method 4 : Without using built in functions in python: 

Python3




# Python program to find largest
# number in a list
 
def myMax(list1):
 
    # Assume first number in list is largest
    # initially and assign it to variable "max"
    max = list1[0]
 # Now traverse through the list and compare
    # each number with "max" value. Whichever is
    # largest assign that value to "max'.
    for x in list1:
        if x > max :
             max = x
     
    # after complete traversing the list
    # return the "max" value
    return max
 
 
# Driver code
list1 = [10, 20, 4, 45, 99]
print("Largest element is:", myMax(list1))

Output

Largest element is: 99

Method: Use the max() and def functions to find the largest element in a given list. The max() function prints the largest element in the list.  

Python3




# Python code
# To find the largest number in a list
 
def maxelement(lst):
  # displaying largest element
  # one line solution
  print(max(lst))
 
# driver code
# input list
lst = [20, 10, 20, 4, 100]
# the above input can also be given as
# lst = list(map(int, input().split()))  # -> taking input from the user
maxelement(lst)
 
# this code is contributed by gangarajula laxmi

Output

100

Method: Using the lambda function

Python3




# python code to print largest element in the list
 
lst = [20, 10, 20, 4, 100]
print(max(lst, key=lambda value: int(value)) )

Output

100

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