Check whether a value is logical or not in R Programming – is.logical() Function

is.logical() function in R Language is used to check whether a value is logical or not.

Syntax: is.logical(x)

Parameters:
x: Value to be checked

Example 1:

# R Program to test whether
# a value is logical or not

# Calling is.logical() function
is.logical(0)
is.logical(!5)
is.logical(T)
is.logical(FALSE)

Output:

[1] FALSE
[1] TRUE
[1] TRUE
[1] TRUE

Example 2:

# R Program to test whether
# a value is logical or not

# Creating vector
x1 <- c(1, 2, 3, 4)
x2 <- c(T, F, TRUE, FALSE, ! 2)
x3 <- c(1, T, F)

# Calling is.logical() function
is.logical(x1)
is.logical(x2)
is.logical(x3)

Output:

[1] FALSE
[1] TRUE
[1] FALSE

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