Conditional Compilation In C:

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In this video tutorial lets learn about preprocessor command or directives like #ifdef, #else and #endif. These directives are used for conditional compilation.
When To Use #ifdef
1. When we want the compiler to skip certain part of the source code: For this we could even use multi-line comment, but if we already had multi-line comments in the code, we can’t enclose the source code and multi-line comments with another multi-line comment. Nesting of multi-line comments are not allowed in C programming language. So instead of commenting the code we could make use of #ifdef directive.
2. To write portable code: For example, we could write code both for iOS and non-iOS devices. Using #ifdef we could check the device OS and based on that deliver specific set of codes. For this we can use #ifdef
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[@saikatbenjamin]

excellent

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Clear introduction with code.

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[@Vishal_Shevale]

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[@SusilVignesh]

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[@psalc1]

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[@technotipDOTorg]

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[@rishikeshpandey2211]

Nice ....what
If i want to remove all comments of c source code or program
Can u help me ..plz

[@technotipDOTorg]

Sorry, didn't get you.

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