R Booleans / Logical Values

Booleans (Logical Values)

In programming, you often need to know if an expression is true or false.

You can evaluate any expression in R, and get one of two answers, TRUE or FALSE.

When you compare two values, the expression is evaluated and R returns the logical answer:

10 > 9    # TRUE because 10 is greater than 9
10 == 9   # FALSE because 10 is not equal to 9
10 < 9    # FALSE because 10 is greater than 9

You can also compare two variables:

a <- 10
b <- 9

a > b

You can also run a condition in an if statement, which you will learn much more about in the if..else chapter.

a <- 200
b <- 33

if (b > a) {
print ("b is greater than a")
} else {
print("b is not greater than a")
}