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In computer programming, specifically when using the imperative programming paradigm, an assertion is a predicate (a Boolean-valued function over the state space, usually expressed as a logical proposition using the variables of a program) connected to a point in the program, that always should evaluate to true at that point in code execution.
The assert macro implements runtime assertion. If the expression within it is false, the macro will print a message to stderr and call abort(), defined in stdlib.h.The message includes the source filename and the source line number from the macros __FILE__ and __LINE__, respectively. [2]
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The implementation of exception handling in programming languages typically involves a fair amount of support from both a code generator and the runtime system accompanying a compiler. (It was the addition of exception handling to C++ that ended the useful lifetime of the original C++ compiler, Cfront. [18]) Two schemes are most common.
Stack Overflow only accepts questions about programming that are tightly focused on a specific problem. Questions of a broader nature—or those inviting answers that are inherently a matter of opinion—are usually rejected by the site's users, and marked as closed.
A related concept in static type systems is called type assertion, which instruct the compiler to treat the expression of a certain type, disregarding its own inference. Type assertion may be safe (a runtime check is performed) or unsafe. A type assertion does not convert the value from a data type to another.
Visual J# is part of the Microsoft Visual Studio .NET product suite and is designed to help developers and programmers migrate from J++ (or Java) to the .NET Framework. Microsoft later developed the C# ("C Sharp") language as the primary language for the .NET platform, which was in many ways influenced by Java; subsequently the .NET Framework ...
C does not provide direct support to exception handling: it is the programmer's responsibility to prevent errors in the first place and test return values from the functions.