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Definition of Pass By Value

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Definition: In C and C++, parameters to a function are passed by value. This makes a copy of the variable and can be quite slow and inefficient if the variable is large like an array.

C++ also allows Pass by Reference where the address of the variable is passed in. As C lacks references, it is necessary to pass in a pointer to a variable if the function is to change the variable.

Glossary:

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