Python program to find largest number in a list

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