What does extern mean in a function declaration?

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It tells the compiler that a variable or a function exists, even if the compiler hasn’t yet seen it in the file currently being compiled. This variable or function may be defined in another file or further down in the current file.

2012-03-09, 3064👍, 0💬

💬 2023-12-13 kamalesh: thank you

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What is the difference between char a[] = “string”; and char *p = “string”;?
What is the difference between char a[] = “string”; and char *p = “string”;? In the first case 6 bytes are allocated to the variable a which is fixed, where as in the second case if *p is assigned to some other value the allocate memory can change. 2012-03-07, 3078👍, 0💬

What does extern mean in a function declaration?
What does extern mean in a function declaration? It tells the compiler that a variable or a function exists, even if the compiler hasn’t yet seen it in the file currently being compiled. This variable or function may be defined in another file or further down in the current file. 2012-03-09, 3065👍, 0💬

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