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1. assert Marks a runtime check that throws AssertionError when the expression is false. assert value > 0 : "value must be positive"; Enable with -ea on the JVM. 2. default Two contexts: Interface method – supplies a concrete implementation since Java 8. Annnotation element – supplies a fallback value. interface Logger { def ...

Main Function int main() { return 0; } Every C program, regardless of its size, begins execution at the main function, which serves as the entry point. This function is also referred to as the primary function. The keyword int preceding main indicates that the function returns an integer upon completion. Therefore, the statement return 0; ...

Identifiers and Kewyords Identifiers are names given by programmers to variables, functions, attributes, and other objects. Identifier Naming Rules Case-sensitive: acd, ACD, and acD are all different identifiers. Start with a letter or underscore: Must begin with a letter (a-z, A-Z) or underscore _, but not a digit. For example, acd and _acd a ...