In this section, you will learn how to read the principle, rate and time from the user and write a C program to calculate simple interest and the total amount.

**SIMPLE INTERSET = (P*R*T)/100**

(Here, *P = Principal Amount, R= Rate and T= Time*)

**TOTAL AMOUNT = P + Simple Interest**

**Logic :**

- Take input principle amount, time and rate in some variable.
- Then take input time in some variable.
- Then take input rate in some variable.
- Find simple interest using formula mentioned above.
- Finally, print the value of
`Simple Interest`. - Then, to find the
*Total amount*add principal amount to the simple interest.

### Program to calculate simple interest and total amount

/* C-Program: Calculate Simple Interest and total amount */ #include <stdio.h> int main() { long int p; int t; float r, si, tamt; printf("Enter the Principal Amount: "); scanf("%ld", &p); printf("Enter the Time (or period): "); scanf("%d", &t); printf("Enter the Rate of Interest: "); scanf("%f", &r); si = (p*t*r)/100; tamt = p + si; printf("\nPrincipal Amount = %ld", p); printf("\nTime = %d", t); printf("\nRate of interest =%.2f", r); printf("\nSimple Interest = %.2f", si); printf("\nTotal Amount = %.2f", tamt); return 0; }

### Output :-

Enter the Principal Amount: 11200 Enter the Time (or period): 3 Enter the Rate of Interest: 10.5 Principal Amount = 11200 Time = 3 Rate of interest =10.50 Simple Interest = 3528.00 Total Amount = 14728.00