What is Variable in C?
- Variable is the name of the memory location where the data is stored.
- Unlike the constant, the value of variables can be changed while the execution of the program.
- The programmer should choose a meaningful variable name like total, age, height,
- The variable might be belonging to any of the data types like int, float, char etc.
Rules of naming variable in C:
- Variable name should start with the alphabet or underscore.
- Variable name must not start with the digit.
- Variable are case sensitive
- Blank spaces are not allowed while naming the variable.
- Keywords are not allowed to use as a variable name.
Declaration of variables:
Declaration helps the compiler to know the what is the name of variable and type of data it holds