What are macros in C?

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In a C program, all lines that start with # are processed by preprocessor which is a special program invoked by the compiler. In a very basic term, preprocessor takes a C program and produces another C program without any #. Use of macros helps in improving the prgramme execution speed. For more detailed...
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In a C program, all lines that start with#are processed by preprocessor which is a special program invoked by the compiler.In a very basic term, preprocessor takes a C program and produces another C program without any#. Use of macros helps in improving the prgramme execution speed. For more detailed understand please refer this link https://www.geeksforgeeks.org/interesting-facts-preprocessors-c/ read less
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Computer Science Tutor

It is a program that processes our source code before it is passed to the compiler. Each of the preprocessor (macro) statement starts with # symbol. The two most frequently used features are #include and #define.
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