How to Apply the stopifnot() Function in R (Example Code)

In this article, I’ll show how to apply the stopifnot function to test for the truth of certain expressions in the R programming language.

How to Apply the stopifnot() Function to Test the Truth of Expressions

stopifnot("x" == "x", # Test if all expressions are TRUE
          length(1:3) > 2,
          5 == 4)
# Error: 5 == 4 is not TRUE