How to write code expressions
In this section, we will discuss how to write various basic expressions which are the core elements of writing a program. Later, we will discuss how to create user-defined functions.
Expressions
R code consists of one or more expressions. An expression is an instruction to perform a particular task.
For example, the addition of two numbers is given by the following expression:
>4+5
It gives the following output:
[1] 9
If there is more than one expression in a program, they get executed one by one, in the sequence they appear.
Now we will discuss basic types of expressions.
Constant expression
The simplest form of expression are constant values, which may be character or numeric values.
For example, 100 is a numeric value expression ...
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