Map and Lambda Function in Python | HackerRank Programming Solutions | HackerRank Python Solutions

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Introduction To Python

Python is a widely-used, interpreted, object-oriented, and high-level programming language with dynamic semantics, used for general-purpose programming. It was created by Guido van Rossum, and first released on February 20, 1991.

Python is a computer programming language often used to build websites and software, automate tasks, and conduct data analysis. It is also used to create various machine learning algorithm, and helps in Artificial Intelligence. Python is a general purpose language, meaning it can be used to create a variety of different programs and isn’t specialized for any specific problems. This versatility, along with its beginner-friendliness, has made it one of the most-used programming languages today. A survey conducted by industry analyst firm RedMonk found that it was the most popular programming language among developers in 2020.

Link for the Problem – Map and Lambda Function in Python – HackerRank Solution

Map and Lambda Function in Python – HackerRank Solution

Problem:

Let’s learn some new Python concepts! You have to generate a list of the first  fibonacci numbers,  being the first number. Then, apply the map function and a lambda expression to cube each fibonacci number and print the list.

Concept

The map() function applies a function to every member of an iterable and returns the result. It takes two parameters: first, the function that is to be applied and secondly, the iterables.
Let’s say you are given a list of names, and you have to print a list that contains the length of each name.

>> print (list(map(len, ['Tina', 'Raj', 'Tom'])))  
[4, 3, 3]  

Lambda is a single expression anonymous function often used as an inline function. In simple words, it is a function that has only one line in its body. It proves very handy in functional and GUI programming.

>> sum = lambda a, b, c: a + b + c
>> sum(1, 2, 3)
6

Note:

Lambda functions cannot use the return statement and can only have a single expression. Unlike def, which creates a function and assigns it a name, lambda creates a function and returns the function itself. Lambda can be used inside lists and dictionaries.

Input Format

One line of input: an integer .

Constraints

Output Format

A list on a single line containing the cubes of the first  fibonacci numbers.

Sample Input

5

Sample Output

[0, 1, 1, 8, 27]

Explanation

The first  fibonacci numbers are , and their cubes are .

Map and Lambda Function in Python – HackerRank Solution

cube = lambda x: x ** 3


def fibonacci(n):
    a, b, c = 0, 1, 1
    for _ in range(n):
        yield a
        a, b = b, a + b
        
if __name__ == '__main__':
    n = int(input())
    print(list(map(cube, fibonacci(n))))