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}
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}
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}
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}
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\value{
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\value{
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  (\code{\link{NULL}} if all statements in \code{\dots} are \code{TRUE}.)
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  (\code{\link{NULL}} if all statements in \code{\dots} are \code{TRUE}.)
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}
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}
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\seealso{\code{\link{stop}}, \code{\link{warning}}.}
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\seealso{\code{\link{stop}}, \code{\link{warning}};
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  \code{\link{assertCondition}} in package \pkg{tools} complements
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  \code{stopifnot()} for testing warnings and errors.
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}
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\examples{
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\examples{
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stopifnot(1 == 1, all.equal(pi, 3.14159265), 1 < 2) # all TRUE
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stopifnot(1 == 1, all.equal(pi, 3.14159265), 1 < 2) # all TRUE
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m <- matrix(c(1,3,3,1), 2, 2)
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m <- matrix(c(1,3,3,1), 2, 2)
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stopifnot(m == t(m), diag(m) == rep(1, 2)) # all(.) |=>  TRUE
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stopifnot(m == t(m), diag(m) == rep(1, 2)) # all(.) |=>  TRUE