Course Content
R Introduction: Part I
R Introduction: Part I
Variables
Saving and reusing data effectively in programming often requires the use of variables.
To ensure clear and error-free programming, certain rules must be followed when naming variables. Here are some guidelines:
- Variable names must not start with a number or with a period followed by a number;
- They should not include the
%symbol; - They must not begin with an underscore
_; - They can start with a period if it is not followed by a number.
Choosing meaningful variable names is considered best practice. For instance, naming a variable year to store the value 2020 is more intuitive than using nondescript names like a or b. While this isn't mandatory, it significantly enhances code readability for both the author and others.
To assign a value to a variable, the assignment operator = is used. For example, year = 2020 assigns the value 2020 to the variable named year:
year = 2020 cat(year)
Swipe to show code editor
Regarding the deposit task, let's assign the relevant data to variables using the assignment operator:
- Assign the initial amount of money,
2000, to the variable namedinitial_money. - Assign the interest rate,
13, to the variable namedinterest_rate. - Assign the number of years,
4, to the variable namedn_years. - Use the
cat()function to display the values ofinitial_money,interest_rate, andn_yearsin the order they were created.
Switch to desktop for real-world practiceContinue from where you are using one of the options belowThanks for your feedback!
Variables
Saving and reusing data effectively in programming often requires the use of variables.
To ensure clear and error-free programming, certain rules must be followed when naming variables. Here are some guidelines:
- Variable names must not start with a number or with a period followed by a number;
- They should not include the
%symbol; - They must not begin with an underscore
_; - They can start with a period if it is not followed by a number.
Choosing meaningful variable names is considered best practice. For instance, naming a variable year to store the value 2020 is more intuitive than using nondescript names like a or b. While this isn't mandatory, it significantly enhances code readability for both the author and others.
To assign a value to a variable, the assignment operator = is used. For example, year = 2020 assigns the value 2020 to the variable named year:
year = 2020 cat(year)
Swipe to show code editor
Regarding the deposit task, let's assign the relevant data to variables using the assignment operator:
- Assign the initial amount of money,
2000, to the variable namedinitial_money. - Assign the interest rate,
13, to the variable namedinterest_rate. - Assign the number of years,
4, to the variable namedn_years. - Use the
cat()function to display the values ofinitial_money,interest_rate, andn_yearsin the order they were created.
Switch to desktop for real-world practiceContinue from where you are using one of the options belowThanks for your feedback!
Switch to desktop for real-world practiceContinue from where you are using one of the options below