C programming

Defining Symbolic Constants

In C programming, symbolic constants are identifiers that represent constant values. They are defined using the #define preprocessor directive. Symbolic constants make your code more readable and maintainable by giving meaningful names to constants.

Here's an example of defining symbolic constants:

                    #include <stdio.h>

                        // Defining symbolic constants
                        #define PI 3.14159
                        #define MAX_LENGTH 100
                        
                        int main() {
                            // Using symbolic constants
                            double radius = 5.0;
                            double area = PI * radius * radius;
                        
                            char name[MAX_LENGTH];
                            printf("Enter your name (up to %d characters): ", MAX_LENGTH - 1);
                            scanf("%s", name);
                        
                            printf("Hello, %s!\n", name);
                            printf("Area of a circle with radius %.2f is %.2f\n", radius, area);
                        
                            return 0;
                        }

In this example, PI and MAX_LENGTH are symbolic constants representing the value of pi and the maximum length of a name, respectively. Using these constants makes the code easier to understand and maintain.

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Q1. Symbolic constants can be defined using _____________.

A #define

B symbols

C const

D None of these

Q2. Which of the following is a valid naming convention for symbolic constants in C?

A MAX_VALUE

B 1st constant

C Constant value

D Variable Constant

Getting Started With C

Defining Symbolic Constants

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