assert(3) — bsd

ASSERT(3)                            BSD                             ASSERT(3)



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.
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