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.

# 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

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