Python Program to Find the Largest Number in a List

Lists in Python:

Lists are one of Python’s most commonly used built-in data structures. You can make a list by putting all of the elements inside square brackets[ ] and separating them with commas. Lists can include any type of object, making them extremely useful and adaptable.

Given a list, the task is to find the largest number in the given list in Python.

Examples:

Example1:

Input:

given list =[1, 1, 2, 3, 4, 5, 7, 9, 15, 18, 18, 18, 26, 27, 34, 36, 47, 47, 52, 64, 65, 82, 82, 189, 274, 284, 467, 677,
                   871, 873, 876, 947, 1838, 2954, 5123]

Output:

The largest element present in the given list [1, 1, 2, 3, 4, 5, 7, 9, 15, 18, 18, 18, 26, 27, 34, 36, 47, 47, 52, 64, 65, 82,
82, 189, 274, 284, 467, 677, 871, 873, 876, 947, 1838, 2954, 5123] = 5123

Example2:

Input:

given list =[1, 2, 4, 8, 9, 11, 12, 13, 15, 15, 17, 18, 23, 23, 25, 28, 29, 31, 34]

Output:

The largest element present in the given list [1, 2, 4, 8, 9, 11, 12, 13, 15, 15, 17, 18, 23, 23, 25, 28, 29, 31, 34] = 34

Program to Find the Largest Number in a List in Python

There are several ways to find the largest element/item in the given list some of them are:

Using sort() function in Ascending Order(Static Input)
Using sort() function in Ascending Order(User Input)
Using sort() function in Descending Order(User Input)
Using max() function(Static Input)
Using max() function(User Input)

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Method #1:Using sort() function in Ascending Order(Static Input)

Approach:

Given the list as static input and store it in a variable.
Sort the given list using the sort() function(which sorts the elements in ascending order).
Calculate the length of the given list using the len() function and store it in a variable.
Print the largest element in the given list with the help of the length of the list variable(The last element can be found at the index length of list -1)
The Exit of the Program.

Below is the implementation:

# Given the list as static input and store it in a variable.
gvnList = [12, 34, 11, 9, 2, 4, 1, 23, 28,
           29, 25, 23, 31, 18, 15, 8, 13, 15, 17]
# Sort the given list using the sort() function
# (which sorts the elements in ascending order).
gvnList.sort()
# Calculate the length of the given list using the len() function
# and store it in a variable.
lstLeng = len(gvnList)
# Print the largest element in the given list with the help of the length of the
# list variable(The last element can be found at the index length of list -1)
largstele = gvnList[lstLeng-1]
print('The largest element present in the given list', gvnList, '=', largstele)

Output:

The largest element present in the given list [1, 2, 4, 8, 9, 11, 12, 13, 15, 15, 17, 18, 23, 23, 25, 28, 29, 31, 34] = 34

Method #2:Using sort() function in Ascending Order(User Input)

Approach:

Given the list as user input separated by spaces using map(),split(),list() and int functions.
Store the list in one variable.
Sort the given list using the sort() function(which sorts the elements in ascending order).
Calculate the length of the given list using the len() function and store it in a variable.
Print the largest element in the given list with the help of the length of the list variable(The last element can be found at the index length of list -1)
The Exit of the Program.

Below is the implementation:

# Given the list as user input separated by spaces
# using map(),split(),list() and int functions.
# Store the list in one variable.
gvnList = list(map(int, input('Enter some random elements to the list separated by spaces = ').split()))
# Sort the given list using the sort() function
# (which sorts the elements in ascending order).
gvnList.sort()
# Calculate the length of the given list using the len() function
# and store it in a variable.
lstLeng = len(gvnList)
# Print the largest element in the given list with the help of the length of the
# list variable(The last element can be found at the index length of list -1)
largstele = gvnList[lstLeng-1]
print('The largest element present in the given list', gvnList, '=', largstele)

Output:

Enter some random elements to the list separated by spaces = 36 18 1 34 9 7 64 15 284 1838 189 873 52 47 18 
65 677 876 2954 26 82 871 467 274 5123 82 947 27 47 18 1 4 3 5 2
The largest element present in the given list [1, 1, 2, 3, 4, 5, 7, 9, 15, 18, 18, 18, 26, 27, 34, 36, 47, 47, 52, 64, 65, 82,
82, 189, 274, 284, 467,  677, 871, 873, 876, 947, 1838, 2954, 5123] = 5123

Method #3:Using sort() function in Descending Order(User Input)

Approach:

Given the list as user input separated by spaces using map(),split(),list() and int functions.
Store the list in one variable.
Sort the given list in descending order using the sort() and reverse=True(which sorts the elements in descending order).
Print the largest element in the given list by printing the first element in the given list(which is having an index of 0)
The Exit of the Program.

Below is the implementation:

# Given the list as user input separated by spaces
# using map(),split(),list() and int functions.
# Store the list in one variable.
gvnList = list(map(int, input('Enter some random elements to the list separated by spaces = ').split()))
#Sort the given list in descending order using the sort() 
#and reverse=True(which sorts the elements in descending order).
gvnList.sort(reverse=True)

#Print the largest element in the given list by printing the first
#element in the given list(which is having an index of 0)
largstele = gvnList[0]
print('The largest element present in the given list', gvnList, '=', largstele)

Output:

Enter some random elements to the list separated by spaces = 36 282 194 196 578 1 2 34 727 84
The largest element present in the given list [727, 578, 282, 196, 194, 84, 36, 34, 2, 1] = 727

Method #4:Using max() function(Static Input)

This is the easiest and fastest approach.

Approach:

Given the list as static input and store it in a variable.
Print the maximum element in the given by providing the given list as an argument to max() function.
The Exit of the Program.

Below is the implementation:

# Given the list as static input and store it in a variable.
gvnList = [49, 189, 18, 9, 10, 2, 49, 1, 38, 29]
# Print the maximum element in the given by
# providing the given list as an argument to max() function.
largstele = max(gvnList)
print('The largest element present in the given list', gvnList, '=', largstele)

Output:

The largest element present in the given list [49, 189, 18, 9, 10, 2, 49, 1, 38, 29] = 189

This is the efficient way to find the largest element in the given list.

Method #5:Using max() function(User Input)

This is the easiest and fastest approach.

Approach:

Given the list as user input separated by spaces using map(),split(),list() and int functions.
Store the list in one variable.
Print the maximum element in the given by providing the given list as an argument to max() function.
The Exit of the Program.

Below is the implementation:

# Given the list as user input separated by spaces
# using map(),split(),list() and int functions.
# Store the list in one variable.
gvnList = list(map(int, input('Enter some random elements to the list separated by spaces = ').split()))
# Print the maximum element in the given by
# providing the given list as an argument to max() function.
largstele = max(gvnList)
print('The largest element present in the given list', gvnList, '=', largstele)

Output:

Enter some random elements to the list separated by spaces = 46 28 1 937 472 8545 28 1 83 94 28 95 27 58
The largest element present in the given list [46, 28, 1, 937, 472, 8545, 28, 1, 83, 94, 28, 95, 27, 58] = 8545

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