C Program to Calculate Simple interest and Compound interest

In today’s post, we will make a program in c to calculate Simple Interest and Compound Interest 

But before that, we know what is Simple Interest and Compound Interest and how to get it out. 

Introduction to simple interest and compound interest

Simple Interest and Compound Interest is a way to calculate the interest on the loan taken by you. Simple interest is calculated on the principal amount, this formula is used to calculate the simple interest.

S.I = (P * R * T) / 100 where P = Principal, R = Rate and T = Time

Compound interest is calculated on the principal amount plus that interest. This formula is used to calculate compound interest.

CI = P(1 + r / n)nt where P = Principal, R = Rate, n = number of compounding periods per unit and T = Time.

C Program to Calculate Simple interest

Algorithm -:

• Program start.
• Declaration of variable with their data type,  like :- int  P, R, T; float I;
• Input the value in variable
• Arithmetic operator used to perform SI=(p*r*t)/100;
• printf( ) called to print value of variable
• Program end.

Flowchart -:

Program For Simple Interest

#include<stdio.h>
void main()
{
   int p,r,t;
   float i;
   printf("Enter the Principal, Rate and Time\n");
   scanf("%d %d %d",&p,&r,&t);

/*Formula for calculating simple interest*/

   i=p*r*t/100;       

   printf("simple interest is : %f",i);
}

Run Code (Live Demo)

Output -:

Enter the Principal, Rate and Time
1000
7
8
simple interest is : 560.00000

C Program to Calculate Coumpound interest

Algorithm

• Program start.
• Declaration of variable with their data type,  like :- int  p, r, t,CI; float I;
• Input the value in variable
• CI = p*pow((1+r/100),t);
• printf( ) called to print value of CI
• Program end.

Program for Compound Interest

#include<stdio.h>
#include<math.h>
int main() 
{
	float p,r,t,CI;
	printf("Enter Principle, rate and time\n");
	scanf("%f%f%f",&p,&r,&t);

/*Formula for calculating 
Compound Interest
*/

	CI = p*pow((1+r/100),t);   
	printf("Compound interest is : %f\n", CI);
  return 0;
}

Run Code (Live Demo)

Output -:

Enter Principle, rate and time
1000
7
8
Compound interest is : 1718.186890

C Program For simple interest and Compound interest

Algorithm

• Program start.
• Declaration of variable with their data type,  like :- int  p, r, t,i, CI; float
• Input the value in variable
• i=p*r*t/100;
• CI = p*pow((1+r/100),t);
• printf( ) called to print value of i and CI
• Program end.

#include<stdio.h>
#include<math.h>
int main() 
{
    int p,i,t;
	float r,CI;
	printf("Enter Principle, rate and time\n");
	scanf("%d%f%d",&p,&r,&t);

/*Formula for calculating Compound Interest  */

    i=p*r*t/100; 

/*Formula for calculating Compound Interest*/

	CI = p*pow((1+r/100),t);  
 
  printf("simple interest is : %d",i);
	printf("Compound interest is : %f\n", CI);
  return 0;
}

Run Code (Live Demo)

Output

Enter Principle, rate and time
1000
7
8
simple interest is : 560.000000
Compound interest is : 1718.186890

Read More

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• 250+ C Programs for Practice PDF Free Download

Conclusion

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