## In this tutorial, you’ll learn How to Calculate Simple Interest in C Programming.

*Simple interest* is a quick method to calculate the *interest* charge on a loan. To Calculate *Simple interest* is determined by multiplying the daily *interest* rate by the principal by the number of days that elapse between payments.

**Simple Interest formula**

The formula for simple interest is given by – **simple interest = principle x rate x time / 100**

P is the principal amount

T is the time and

R is the rate

#### The logic to calculate a simple interest

Step by step descriptive logic to calculate simple interest –

- Input principle amount in some variable says principle.
- Input time in some variable says time.
- Input rate in some variable says rate.
- Now, apply the formula to calculate simple interest i.e. SI = (principle * time * rate) / 100.
- Finally, print the resultant value of SI.

#### Program to calculate the simple interest

[sourcecode language=”plain”]

#include &amp;lt;stdio.h&amp;gt;

int main()

{

float principle, time, rate, SI;

/* Input principle, rate and time */

printf(&amp;quot;Enter principle (amount): &amp;quot;);

scanf(&amp;quot;%f&amp;quot;, &amp;amp;principle);

printf(&amp;quot;Enter time: &amp;quot;);

scanf(&amp;quot;%f&amp;quot;, &amp;amp;time);

printf(&amp;quot;Enter rate: &amp;quot;);

scanf(&amp;quot;%f&amp;quot;, &amp;amp;rate);

/* Calculate simple interest */

SI = (principle * time * rate) / 100;

/* Print the resultant value of SI */

printf(&amp;quot;Simple Interest = %f&amp;quot;, SI);

return 0;

}[/sourcecode]

**Output:**

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Ask your questions and clarify your/others doubts on C Program to Calculate the Simple Interest by commenting.** Documentation**