Introduction to Arithmetic in R

R can be used as a simple calculator to perform arithmetic operations.

Basic Arithmetic Operations

R supports common mathematical operations:

• Addition (+)
• Subtraction (-)
• Multiplication (*)
• Division (/)
• Exponentiation (^)
• Modulo (%%)

Performing Calculations

Try performing basic calculations in R:

5 + 3
10 - 2
4 * 6
8 / 2
2^3
10 %% 3

Variables in R

Variables store values that can be reused.

x <- 10
y <- 5
z <- x + y

Assigning Values to Variables

Use the assignment operator <- to store values in variables.

Variable Naming Rules

Variable names:

• Can contain letters, numbers, and underscores.
• Cannot start with a number.
• Are case-sensitive (e.g., Var and var are different).

Using Variables in Expressions

You can use variables in calculations:

x <- 10
y <- 2
z <- x * y

Checking Variable Types

You can check the type of a variable using the class() function.

x <- 42
class(x)

Summary

In this lesson, you learned how to:

• Perform basic arithmetic operations.
• Use variables to store values.
• Check variable types.