To find the largest element in an array, iterate over each element and compare it with the current largest element. If an element is greater, update the largest element. At the end of the iteration, the largest element will be found.

Given an array, find the largest element in it.

Input : arr[] = {10, 20, 4}
Output : 20
Input : arr[] = {20, 10, 20, 4, 100}
Output : 100

Find largest element in an array Using Native Approach

# Python3 program to find maximum# in arr[] of size n# python function to find maximum# in arr[] of size ndeflargest(arr,n):# Initialize maximum elementmax=arr[0]# Traverse array elements from second# and compare every element with# current maxforiinrange(1,n):ifarr[i]>max:max=arr[i]returnmax# Driver Codearr=[10,324,45,90,9808]n=len(arr)Ans=largest(arr,n)print("Largest in given array ",Ans)

Largest in given array  9808

Here we will use the inbuilt methodmax() to find the maximum of the array. Below is the implementation of the approach.

# Python3 program to find maximum# in arr[] of size ndeflargest(arr,n):ans=max(arr)returnans;# Driver codeif__name__=='__main__':arr=[10,324,45,90,9808]n=len(arr)print("Largest in given array ",largest(arr,n))

Largest in given array  9808

Time Complexity: O(n), where n is length of list.
Auxiliary Space: O(1)

Find largest element in an array Using sort() function

Here we use thesort() function to sort the array. The largest element will be the last element of the sorted array. Below is the implementation of the approach.

# Python3 program to find maximum# in arr[] of size ndeflargest(arr,n):# Sort the arrayarr.sort()# The last element of the# array is the largest elementreturnarr[n-1]# or return arr[-1]# Driver Codearr=[10,324,45,90,9808]n=len(arr)Ans=largest(arr,n)print("Largest in given array ",Ans)

Largest in given array  9808

Find largest element in an array Using reduce() function

Here we use thereduce() function to iterate over the array. We will find the largest element the max function which will compare each element of array while iterating. 

Below is the implementation of the above approach:

# Python3 program to find maximum# in arr[] of size nfromfunctoolsimportreducedeflargest(arr):# Sort the arrayans=reduce(max,arr)returnans# or returning largest value# Driver Codearr=[10,324,45,90,9808]n=len(arr)Ans=largest(arr)print("Largest in given array ",Ans)

Largest in given array  9808

Time complexity: O(n) where n is size of given array
Auxiliary space: O(1)

Please refer complete article onProgram to find largest element in an array for more details!

Find largest element in an array Using operator.gt()

Create a array of integers and assign it to the variable arr. Print the original array using the print() function.Create an empty array and assign it to the variable arr1.

Sort the original array in descending order using theoperator.gt() function and assign the sorted array to the variable arr1. Print the biggest number in the array by accessing the first element of the sorted array using arr1[0]. Print a message indicating that the biggest number in the array has been found.
 

# python program to find large number in the given arrayimportoperator# Initializing the listarr=[2,1,7,3,0]max=0# printing the original listprint('The given array is:',arr)#checking for large elementforiinarr:ifoperator.gt(i,max):max=i# printing the large number in the arrayprint('The biggest number in the given array is:',max)

The given array is: [2, 1, 7, 3, 0]The biggest number in the given array is: 7

Time Complexity : O(n)

Auxiliary Space : O(1)

Find Largest Element with Python Lambda

In this program, we have an array called array with some elements. We use the max function to find the largest element in the array. The key parameter is set to alambda function lambda x: x, which simply returns the element itself. This lambda function is used to determine the comparison key for the max function.

array=[10,5,20,8,15]largest_element=max(array,key=lambdax:x)print("Largest element in the array:",largest_element)

Output:

Largest element in the array: 20

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