C variables and constants
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A variable is a name given to a memory location that can store a value of a specified data type, such as integer or float, which can be changed during runtime. A constant is similar to a variable but once initialized, its value cannot be changed. Constants are typically defined with a #define statement without an equal sign or semicolon, or with the const modifier and an equal sign for initialization. Both variables and constants must be declared with a data type and can make programs more readable and maintainable by using descriptive names.
C variables and constants
- 1. Notes on Variable & Constant Instructor: Arghodeep Paul Firmware Engineer at BitBible Technologies Pvt. Ltd. Content Author: Arghodeep Paul License: OpenSource Date: 14 July 2021
- 2. Variable A Variable is nothing but a name given to a Memory location. That Memory Location belongs to Primary Storage(RAM) or in CPU registers. Variables are created of a specific Data Type. Syntax int number; // declaration of a int type variable number=3; // initialization of the value Or int number=3; // declaration and initialization together Constant Same as the variable but the only difference is you can not change the Value after it has been initialized. Syntax #define PI 3.14 //no equal sign no semicolon Or const float PI=3.14; Note: Constant identifiers are written in CAPITAL as a convention.