Variable Declaration

Variables are something like a character or word that you use to temporarily store some value.
There are specific types of data that you can store in C Language. A few of them are
integer (int), character (char), decimal number (float), etc...

There's a question in Chapter 2 Page no 89 of the book i mentioned

Code the variable declarations for each of the following:

a. a character variable named option

b. an integer variable, sum, initialised to 0

c. a floating-point variable, product, initialised to 1

Well lets see how to do it:

/*include your necessary headers*/

#include<stdio.h>

/*write your main() function*/

int main()

{

      /*Declare the character*/

      char option;

     

      /*Declare the integer*/

      int sum=0;

      /*Declare the decimal no*/

      float product;

      product=1;

      return 1;

}

You can see how we initialise the variables in two different ways.

1. You can initialise the variable while declaring it.( int sum=0; )
2. You can initialise the variable in a separate line after declaring it ( float product; product =1; )

Both will do the job!

A similar question in the same page:

Code the variable declarations for each of the following:

a. a short integer variable named code

b. a constant named salesTax initialised to .0825

c. a floating-point number sum of size double initialised to 0;

Well lets see how to do it:

/*include your necessary headers*/
#include<stdio.h>

/*write your main() function*/
int main()
{
      /*Declare the short integer*/
      short code;
     
      /*Declare the constant*/
      const float salesTax=0.0825;

      /*Declare the floating no of size double*/
      double sum;
      sum=0;

      return 1;
}

That's it! Now we can move on to the next topics.

I made a sample program to show the declaration:

No issues says that it is valid:)

Stay tuned for more!