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R Introduction

bookVariables

Note
Definition

A variable is a named location in memory that holds a value. The name can then be used to access or modify that value.

Variables are essential in R because they allow you to store values for later use, making code easier to write, read, and maintain.

Naming Rules

  • A variable name can include letters, numbers, dots(.), and underscores(_);
  • A variable name can only start with a letter or a dot;
  • If a variable name starts with a dot, the next character can't be a number;
  • A variable name cannot be the same as a reserved keyword, such as TRUE, FALSE, NA, etc.
Note
Note

Choose meaningful names that describe the data. For example, year is more descriptive than a. This improves code readability.

Assignment Syntax

To assign a value to a variable, the assignment operator = can be used.

Example


              
12

            
year = 2020
cat(year)
copy
Task

Swipe to start coding

You want to prepare values for a deposit calculation. Save the following data into variables:

  • 2000 as initial_money;
  • 13 as interest_rate;
  • 4 as n_years.

Then, use cat() to display these values together in the same order.

Solution

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SectionΒ 1. ChapterΒ 8
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bookVariables

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Note
Definition

A variable is a named location in memory that holds a value. The name can then be used to access or modify that value.

Variables are essential in R because they allow you to store values for later use, making code easier to write, read, and maintain.

Naming Rules

  • A variable name can include letters, numbers, dots(.), and underscores(_);
  • A variable name can only start with a letter or a dot;
  • If a variable name starts with a dot, the next character can't be a number;
  • A variable name cannot be the same as a reserved keyword, such as TRUE, FALSE, NA, etc.
Note
Note

Choose meaningful names that describe the data. For example, year is more descriptive than a. This improves code readability.

Assignment Syntax

To assign a value to a variable, the assignment operator = can be used.

Example


              
12

            
year = 2020
cat(year)
copy
Task

Swipe to start coding

You want to prepare values for a deposit calculation. Save the following data into variables:

  • 2000 as initial_money;
  • 13 as interest_rate;
  • 4 as n_years.

Then, use cat() to display these values together in the same order.

Solution

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Everything was clear?

How can we improve it?

Thanks for your feedback!

SectionΒ 1. ChapterΒ 8
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