Check whether a value is logical or not in R Programming – is.logical() Function Improve Improve Like Article Like Save Share Report 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 Last Updated : 16 Jun, 2020 Like Article Save Article Previous Calculate Inverse cosine of a value in R Programming - acos() Function Next Convert values of an Object to Logical Vector in R Programming - as.logical() Function Share your thoughts in the comments Add Your Comment Please Login to comment...