R Programming language - R Variables and Constants

In R, variables and constants are used to store data values. Variables are used to store data that may change during the execution of the program, while constants are used to store data that remains constant throughout the program.

To create a variable in R, you use the assignment operator "<-" or "=" to assign a value to a variable name. Here's an example:

x <- 5   # create a variable named x and assign it the value 5

In this example, we created a variable named x and assigned it the value 5 using the assignment operator "<-".

You can also use "=" as the assignment operator, like this:

x = 5    # create a variable named x and assign it the value 5

Constants, on the other hand, are created using the "const" keyword. Here's an example:

const pi = 3.14159   # create a constant named pi and assign it the value 3.14159

In this example, we created a constant named pi and assigned it the value 3.14159 using the "const" keyword.

In R, variable names can contain letters, numbers, and underscores, but must begin with a letter or underscore. Variable names are case-sensitive, so "x" and "X" are considered to be different variables.

Constants, like variable names, can also contain letters, numbers, and underscores, and must begin with a letter or underscore. However, constants are typically written in all caps to distinguish them from variables.

In summary, variables and constants are used to store data values in R. Variables are created using the assignment operator "<-" or "=", while constants are created using the "const" keyword. Variable and constant names must follow certain rules regarding the use of letters, numbers, and underscores.