What is a macro, Computer Engineering

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What is a macro ? How it is defined ?

Preprocessor' is a translation phase that is applied to  source code before the compiler  proper  gets  its  hands on  it.  Generally,  the  preprocessor  performs  textual substitutions on  source code. Macro is a type of preprocessor which replaces instances of one piece of text with another. A preprocessor line of the form

#define name text

 


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