Variables
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.
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
12year = 2020 cat(year)
Swipe to start coding
You want to prepare values for a deposit calculation. Save the following data into variables:
2000
asinitial_money
;13
asinterest_rate
;4
asn_years
.
Then, use cat()
to display these values together in the same order.
Solution
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Variables
Swipe to show menu
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.
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
12year = 2020 cat(year)
Swipe to start coding
You want to prepare values for a deposit calculation. Save the following data into variables:
2000
asinitial_money
;13
asinterest_rate
;4
asn_years
.
Then, use cat()
to display these values together in the same order.
Solution
Thanks for your feedback!
single