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

## Introduction

Operator precedence determines the order with which different parts of the code/expression should be evaluated. For instance, `1 + 1 * 5` would give us `6` rather than `10` as `*` has higher precedence than `+`. If we wanted `10` we could write the expression as `(1 + 1) * 5` as `()` has higher precedence than `*`.

By now we have concluded that operators in Scala aren't really operators, they are simply methods in operator notation. Hence, when looking at operator precedence, we look at the first character of the symbol of an operator (method). If the first character of an operator is higher up in the precedence table, it will be evaluated first.

## Precedence Table

Below, you'll find the precedence with operator precedence being highest at the top and getting lower as you come down.

| **Operator Precedence**     |
|-----------------------------|
| `()` `[]`                   | 
| special characters: `~` `!` | 
| `*` `/` `%`                 |
| `+` `-`                     |  
| `:`                         | 
| `!=` `==`                   | 
| `<` `>`                     |
| `&`                         | 
| `^`                         | 
| `|`                         | 
| letters                     |
| assignment operators        | 

There might be some operators in the list you aren't familiar with, but that's okay; they will be discussed in future chapters. The purpose of this list is to provide you a comprehensive operator precedence order which you can go back to again and again whenever needed.



# Introduction

Operator precedence determines the order with which different parts of the code/expression should be evaluated. For instance, `1 + 1 * 5` would give us `6` rather than `10` as `*` has higher precedence than `+`. If we wanted `10` we could write the expression as `(1 + 1) * 5` as `()` has higher precedence than `*`.

By now we have concluded that operators in Scala aren't really operators, they are simply methods in operator notation. Hence, when looking at operator precedence, we look at the first character of the symbol of an operator (method). If the first character of an operator is higher up in the precedence table, it will be evaluated first.

# Precedence Table

Below, you'll find the precedence with operator precedence being highest at the top and getting lower as you come down.

| **Operator Precedence**     |
|-----------------------------|
| `()` `[]`                   | 
| special characters: `~` `!` | 
| `*` `/` `%`                 |
| `+` `-`                     |  
| `:`                         | 
| `!=` `==`                   | 
| `<` `>`                     |
| `&`                         | 
| `^`                         | 
| `|`                         | 
| letters                     |
| assignment operators        | 

There might be some operators in the list you aren't familiar with, but that's okay; they will be discussed in future chapters. The purpose of this list is to provide you a comprehensive operator precedence order which you can go back to again and again whenever needed.



In the following lesson, you will be introduced to which operators in Scala hold precedence over others.

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

Operator Precedence

Introduction