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C Language > Learn C Language > What is a constant in C?
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What is a constant in C?

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In the context of C programming, a constant refers to a value that cannot be altered or modified during the execution of a program. It remains fixed throughout the program's execution. Constants can be of different types, including integer constants, floating-point constants, character constants, and...
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In the context of C programming, a constant refers to a value that cannot be altered or modified during the execution of a program. It remains fixed throughout the program's execution. Constants can be of different types, including integer constants, floating-point constants, character constants, and string constants.

For example, in the following C code:

c
#include <stdio.h> int main() { const int MAX_VALUE = 100; printf("The maximum value is: %d\n", MAX_VALUE); return 0; }

Here, MAX_VALUE is a constant with a value of 100, and it cannot be changed later in the program.

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Experienced Computer trainer having worked in IT sector for 20 years.

A constant is a name given to the variable whose values can't be altered or changed. A constant is very similar to variables in the C programming language, but it can hold only a single variable during the execution of a program.
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