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  2. Initialization (programming) - Wikipedia

    en.wikipedia.org/wiki/Initialization_(programming)

    In computer programming, initialization or initialisation is the assignment of an initial value for a data object or variable. The manner in which initialization is performed depends on the programming language, as well as the type, storage class, etc., of an object to be initialized.

  3. Value type and reference type - Wikipedia

    en.wikipedia.org/wiki/Value_type_and_reference_type

    Java [4] all non-object types, including (e.g.) booleans and numbers: all object types, including (e.g.) arrays C++: all data types, except reference types, array types and function types: arrays and functions C# [5] all non-object types, including structures and enumerations as well as primitive types: all object-types, including both classes ...

  4. Primitive data type - Wikipedia

    en.wikipedia.org/wiki/Primitive_data_type

    A Boolean type, typically denoted bool or boolean, is typically a logical type that can have either the value true or the value false. Although only one bit is necessary to accommodate the value set true and false, programming languages typically implement Boolean types as one or more bytes.

  5. C data types - Wikipedia

    en.wikipedia.org/wiki/C_data_types

    For every type T, except void and function types, there exist the types "array of N elements of type T". An array is a collection of values, all of the same type, stored contiguously in memory. An array of size N is indexed by integers from 0 up to and including N−1. Here is a brief example:

  6. Java syntax - Wikipedia

    en.wikipedia.org/wiki/Java_syntax

    A snippet of Java code with keywords highlighted in bold blue font. The syntax of Java is the set of rules defining how a Java program is written and interpreted. The syntax is mostly derived from C and C++. Unlike C++, Java has no global functions or variables, but has data members which are also regarded as global variables.

  7. Boolean data type - Wikipedia

    en.wikipedia.org/wiki/Boolean_data_type

    For containers, __len__ (the special method for determining the length of containers) is used if the explicit Boolean conversion method is not defined. In Ruby, in contrast, only nil (Ruby's null value) and a special false object are false; all else (including the integer 0 and empty arrays) is true.

  8. Uninitialized variable - Wikipedia

    en.wikipedia.org/wiki/Uninitialized_variable

    The function register_student leaks memory contents because it fails to fully initialize the members of struct student new_student. If we take a closer look, in the beginning, age, semester and student_number are initialized. But the initialization of the first_name and last_name members are incorrect.

  9. C++ - Wikipedia

    en.wikipedia.org/wiki/C++

    C++ destructors for local variables are called at the end of the object lifetime, allowing a discipline for automatic resource management termed RAII, which is widely used in C++. Member variables are created when the parent object is created. Array members are initialized from 0 to the last member of the array in order.