## Introduction

Hello and Welcome, readers! We hope you are doing great.

** Ruby** is an open-source, high-level, general-purpose programming language designed by

**Yukihiro Matsumoto**in the

**mid-1990s**. If you want to learn about Ruby, check out our articles on Ruby.

Did you ever get confused between the Unary and Binary + and - operators in Ruby? Don't worry. You are in the right place.

Today, In this blog, we will closely look into the **Unary Plus(+) and Minus(-) Operators in Ruby **with proper explanation and implementation. You will get a clear idea about these operators in Ruby from this article, so follow the article till the end.

So, without further ado, let's start our discussion.

## Unary Operators

In Ruby, the unary operators are the operators that take only a single argument as a receiver. **Boolean NOT(!)**, **Bitwise Complement(~), Unary Plus(+) and Unary Minus(-) **are some of the examples of Unary operators in Ruby.

This article will only consider the **Unary Plus(+) **and** Unary Minus(-) **operators. Don't get confused with the **Binary Plus(+) **and **Binary(-) **operators. Though they look similar, there is a considerable difference between them. The binary operators deal with two arguments, whereas the unary operators only deal with a single argument.

For example,

Unary - on 2 (-2), binary + on 1 and 2 (1 + 2)

Let's now discuss the Unary - and + operators in detail.

### Unary Minus(-) Operator

In Ruby, the Unary minus(-) operator **changes the sign **of its numeric argument. It is not the same thing as the binary - operator. The unary - operator only deals with a single argument used as a notation for the negative numbers like - on 5 (-5), whereas the binary - operator performs **subtraction **between two numbers like 5 - 3.

#### Example

```
a = 5
# using the Unary minus operation on a
b = -a
puts("The value of b = (-a): ")
puts(b)
```

#### Output

```
The value of b = (-a):
-5
```

#### Explanation

In the above example, we can see that we defined a variable named “a” with a value of 5, and the unary minus(-) operation on “a” changes it to “-a”. So the output is -5.

### Unary Plus(+) Operator

The Unary Plus(+) operator in Ruby does not affect the numeric argument. It just simply returns the value of the argument as it is. Like Unary + on 5 returns 5. Simply, it does not have any effect. Rather, it is provided only for the symmetry with the unary - but we can redefine it, which we will discuss later.

As explained earlier, it is also not the same as the binary + operator. The binary + operator performs addition like 1 + 2.

The Unary + operator has a slightly higher precedence than the Unary - operator.

#### Example

```
a = 5
# using the Unary plus operation on a
b = +a
puts("The value of b = (+a): ")
puts(b)
```

#### Output

```
The value of b = (+a):
5
```

#### Explanation

In the above example, we can see that we defined a variable named “a” with a value of 5, and the unary plus(+) operation on “a” does not affect a. So the output is 5.