What is the difference between declaration and definition?

[beingchinmay]

Declaration tells the compiler that at the later point in the program the definition of declared variable will be present.

 

[kunalkumar]

As far as I know, definition defines the memory area ( allocates the memory ) for the variable and the declaration tells about the signature of the variable ( type and size to be considered).

 

[aegisinfoways]

A declaration provides basic features of a symbol: its kind and its name. A definition provides all of the facts of that symbol--if it's a function.

 

[jacks009]

Very informative post thanks for sharing.