ASSERT(3X)                                             ASSERT(3X)

     NAME
          assert - program verification

     SYNOPSIS
          #include <assert.h>

          assert(expression)

     DESCRIPTION
          Assert is a macro that indicates expression is expected to
          be true at this point in the program.  It causes an exit(2)
          with a diagnostic comment on the standard output when
          expression is false (0).  Compiling with the cc(1) option
          -DNDEBUG effectively deletes assert from the program.

     DIAGNOSTICS
          `Assertion failed: file f line n.' F is the source file and
          n the source line number of the assert statement.