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

**TOTAL AMOUNT = P*(1 + R/100) ^{T}**

**COMPOUND INTEREST = TOTAL AMOUNT – P**

### Program to calculate Compound Interest and total amount

/* C-Program:Calculate Compound interest and total amount */ #include <stdio.h> #include <math.h> int main() { long int p; int t; float r, ci, 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); tamt = p*pow((1+r/100),t); ci = tamt-p; printf("\nPrincipal Amount = %ld", p); printf("\nTime = %d", t); printf("\nRate of interest =%.2f", r); printf("\ncompound Int.= %.2f", ci); printf("\nT. Amount = %.2f", tamt); return 0; }

### Output :-

Enter the Principal Amount: 15000 Enter the Time (or period): 3 Enter the Rate of Interest: 10 Principal Amount = 15000 Time = 3 Rate of interest =10.00 compound Int.= 4965.00 T. Amount = 19965.00