Python program to find largest number in a list

Difficulty Level : Easy
Last Updated : 20 Apr, 2020

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.

# 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

# 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

# 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:

# 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

Attention geek! Strengthen your foundations with the Python Programming Foundation Course and learn the basics.

To begin with, your interview preparations Enhance your Data Structures concepts with the Python DS Course. And to begin with your Machine Learning Journey, join the Machine Learning – Basic Level Course

My Personal Notes

Related Articles