Learn the syntax, data types, and operations essential for programming in Scala

Become a Scala Developer

In this module, we will learn Scala from the ground up. This module aims to teach us how to write basic programs, assuming we have no prior knowledge of the language. We will start with a brief introduction to Scala to understand its functionality and applications. We will then move discuss the key features and functions of the language (data types, functions, classes, etc.) in detail. In the end, we will have all the basic knowledge of how to program in Scala.

Learn Scala from Scratch

## Solution

To solve the problem discussed in the previous [lesson](https://www.educative.io/courses/learn-scala/learning-by-example-summation), let's first define a higher-order recursive function `sum` which takes three parameters; a function `f` and two integers `a` and `b` (representing the lower and upper bounds respectively). The basic functionality of `sum` is to take the sum of all the integers between `a` and `b`. The function to be passed as an argument will perform some operation on the integers between `a` and `b`, ex. returning their cube. The result of the parameter function will then be summed to get the result of the higher-order function.


# Solution

To solve the problem discussed in the previous [lesson](https://www.educative.io/courses/learn-scala/learning-by-example-summation), let's first define a higher-order recursive function `sum` which takes three parameters; a function `f` and two integers `a` and `b` (representing the lower and upper bounds respectively). The basic functionality of `sum` is to take the sum of all the integers between `a` and `b`. The function to be passed as an argument will perform some operation on the integers between `a` and `b`, ex. returning their cube. The result of the parameter function will then be summed to get the result of the higher-order function.


In this lesson, we will go over a practical example of higher-order functions and see a higher-order function in action.

Getting to Know Scala

Variables and Types

Operating with Operators

Strings and How to Use Them

Scala's Collection Library

Control Structures

Getting Started with Functions

Higher-Order Functions

Classes and Objects

Conclusion

Summation with Higher-Order Functions

Solution