{"id":9574,"date":"2022-05-11T05:15:48","date_gmt":"2022-05-11T05:15:48","guid":{"rendered":"http:\/\/fastbitlab.com\/?p=9574"},"modified":"2023-09-25T16:13:33","modified_gmt":"2023-09-25T10:43:33","slug":"microcontroller-embedded-c-programming-variable-declaration-vs-definition-an-illustration","status":"publish","type":"post","link":"https:\/\/fastbitlab.com\/blog\/microcontroller-embedded-c-programming-variable-declaration-vs-definition-an-illustration\/","title":{"rendered":"Microcontroller Embedded C Programming Lecture 31| Variable Declaration vs definition : An illustration"},"content":{"rendered":"
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Variable Declaration vs definition : An illustration<\/span><\/strong><\/h1>\n
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Variable Declaration<\/strong><\/span><\/p>\n

A declaration introduces the existence and type of a variable to the compiler. It tells the compiler that a variable with a specific name and data type will be used in the program. A declaration does not allocate memory for the variable; it simply informs the compiler about its existence.<\/span><\/p>\n

Variable Definition<\/strong><\/span><\/p>\n

A definition not only declares the variable but also allocates memory for it. It associates the name of the variable with a specific location in memory where the variable’s value can be stored.<\/span><\/p>\n

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Difference between a variable Declaration and definition in C<\/strong><\/span><\/p>\n