# Calculate interest amount by using formula in C language

CServer Side ProgrammingProgramming

## Problem

Write a C program to calculate the deposited amount incremented after some years with interest

## Solution

The formula for calculating interest is −

M=((r/100) * t);
A=P*exp(M);

Where r= rate of interest

t=no. of years

P=amount to be deposited

M=temporary variable

A= Final amount after interest

## Algorithm

START
Step 1: declare double variables
Step 2: read amount to be deposited
Step 3: read rate of interest
Step 4: read years you want to deposit
Step 5: Calculate final amount with interest
I. M=((r/100) * t);
II. A=P*exp(M);
Step 6: Print final amount
STOP

## Example

#include<stdio.h>
#include<math.h>
#include<ctype.h>
int main(){
double P,r,t,A,M;
printf("amount to be deposit in the bank: ");
scanf("%lf",&P);
printf("\n enter the rate of interest:");
scanf("%lf",&r);
printf("\n How many years you want to deposit:");
scanf("%lf",&t);
M=((r/100) * t);
A=P*exp(M);
printf("\n amount after %0.1lf years with interest is:%0.2lf",t,A);
return 0;
}

## Output

amount to be deposit in the bank: 50000
enter the rate of interest:6.5
How many years you want to deposit:5
amount after 5.0 years with interest is:69201.53
Updated on 06-Mar-2021 16:17:24