How to Assign Fractional Numbers in C

A different variable is needed to assign fractional numbers. Before understand, let’s write a problem.

Code :

#include <stdio.h>  

 int main()  

 {  

     int a = 50, b = 60, sum;  

     sum = a + b;  

     printf("%d + %d = %d", a, b, sum);  

     return 0;  

 }

Output :

Run the program. See the result is 50+60=110. That means the output is right. But If we write the following problem,


Code :

#include <stdio.h>  

 int main()  

 {  

     int a = 50.45, b = 60, sum;  

     sum = a + b;  

     printf("%d + %d = %d", a, b, sum);  

     return 0;  

 }  

Output:

See here we assign 50.45 in as a integer type variable a. Run the program and see the output. Compare the result with the previous. The result is same 110 alhtough we assign 50.45 in the 2^nd program. That means the last resut is wrong. But where is the error? The error created when we assign 50.45 in a integer type variable cause a different variable named “double” is used to assign fractional numbers. So the codes should be,

Code :

#include <stdio.h>  

 int main()  

 {  

     double a = 50.45, b = 60, sum;  

     sum = a + b;  

     printf("%.2lf + %.2lf = %.2lf", a, b, sum);  

     return 0;  

}

Output:

%lf ( Small letter of L ) is used to print fractional numbers. How much numbers we want to print, we’ve to instruct this by writing the number after giving a point. So we wrote %.2lf.

Read the next article to know more,

>>>Basic Structure of C Language

>>>How to Learn C Programming- Lesson #1

>>>How to Learn C Programming- Lesson #2