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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


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