Check if a value or a logical expression is TRUE in R Programming – isTRUE() Function Last Updated : 16 Jun, 2020 Improve Improve Like Article Like Save Share Report isTRUE() function in R Language is used to check whether a value or a logical expression is true or not. Syntax: isTRUE(x) Parameters: x: logical or number-like vector Example 1: # R Program to test whether # an expression is TRUE # Calling isTRUE() Function isTRUE(1) isTRUE(1>0) isTRUE("a") Output: [1] FALSE [1] TRUE [1] FALSE Example 2: # R Program to test whether # an expression is TRUE # Creating vectors x <- c(1, 2) y <- c(4, 5, 6, 7) # Calling isTRUE() Function isTRUE(x < y) isTRUE(x && y) isTRUE(x || y) Output: [1] FALSE [1] TRUE [1] TRUE Like Article Suggest improvement Previous Creating a Vector of sequenced elements in R Programming - seq() Function Next Check whether a value is logical or not in R Programming - is.logical() Function Share your thoughts in the comments Add Your Comment Please Login to comment...