Question

In your own words, explain at least one reason why programming languages have functions. Include an example of something you did in this lesson that demonstrates the reason you describe.

Answer 1

Functions in programming languages enable modularity, reusability, and efficient code management by encapsulating tasks that can be used throughout a program, such as a function to calculate the area of a rectangle.

Step-by-step explanation:

Programming languages have functions because they allow programmers to create modular code, which improves readability, reusability, and efficiency. Functions encapsulate a task or a related group of tasks, thereby enabling the reuse of code, reducing redundancy, and making complex programs easier to manage. A simple example is a function to calculate the area of a rectangle. Rather than repeatedly writing out the formula for area in different parts of a program, a programmer can write a function called calculateArea and simply pass the length and width as parameters whenever the area needs to be calculated.

Answer 2

In programming, function is a block of codes which can be reused to perform a specific task. Functions are ubiquitous in many real world program. One reason why programming languages have functions is that the function can greatly reduce code redundancy. The codes that perform a specific task (e.g. addition), can be grouped into a function block. We just need to call the function name to run that block of code in any part of our program whenever necessary instead of keep writing the same block code over and over again.

One example of function is given below:

def addition(x, y):

result = x + y

return result

To use the function above to perform addition, we just simply call the function name, addition(2 , 5), by passing two values to parameter x and y and it will return addition result, 7. We can repeat the similar function calling by passing another parameters to it and get the addition result accordingly.