Lambda Function

Let's talk about loops and lambda functions in programming.

Loops:

Loops are used in programming to repeatedly execute a block of code until a certain condition is met. There are typically two main types of loops: for loops and while loops.

1. For Loop:

A for loop is used when you know in advance how many times the loop needs to run. It has the following syntax in Python:

for variable in sequence:
    # code to be executed

Example:

for i in range(5):
    print(i)

This will print the numbers 0 through 4.

2. While Loop:

A while loop is used when you want to repeatedly execute a block of code as long as a certain condition is true. It has the following syntax:

while condition:
    # code to be executed

Example:

count = 0
while count < 5:
    print(count)
    count += 1

This will print the numbers 0 through 4 as well.

Lambda Functions:

A lambda function is a small anonymous function defined using the lambda keyword. It can take any number of arguments but can only have one expression. Lambda functions are often used for short operations and are particularly useful when you need a simple function for a short period.

Syntax:

lambda arguments: expression

Example:

# Regular function
def square(x):
    return x ** 2

# Equivalent lambda function
square_lambda = lambda x: x ** 2

print(square(5))         # Output: 25
print(square_lambda(5))  # Output: 25

Lambda functions are often used with functions like map(), filter(), and sorted() for concise and expressive code.

Example with map():

numbers = [1, 2, 3, 4, 5]
squared_numbers = list(map(lambda x: x**2, numbers))
print(squared_numbers)  # Output: [1, 4, 9, 16, 25]

In this example, the lambda function is used to square each element in the list.

Combining loops and lambda functions can make your code concise and expressive, especially when working with functional programming concepts.

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