# Simple Codes

Arithmetic and Storing Values

## Expression

There are three types of expression in R
1. Numbers: 1, 2, 0.2, -5, etc
2. Strings: alphabets or anything that is input by “” into R
3. Logical: TRUE/FALSE

## Expression

• Numbers:
2+3
• Strings:
"Hello"
• TRUE/FALSE
3<4
2+4 == 4

## Arithmetic Operators

x + y sum
x - y subtract
x * y multiply
x / y divide
x ^ y power

## Arithmetic Operators

Do it yourself:

2+4
[1] 6
2^3
[1] 8
850/10
[1] 85
220-20
[1] 200

## Storing Values

• In all programming languages we can store values in variables and access them later.
• This can be done in various ways using a selection of assignment operators.
• The most commonly used assignment operator is <-, see the example below:
x <- 3
y <- "Hey!"

Note: In most contexts the = operator can be used as an alternative.