Value of pie using c ++

Value of pie using c++:

THEORY:

Pi is the ratio of a circle's circumference to its diameter.

Pi is also an irrational number, which means that its value cannot be expressed exactly as a simple fraction. Computers have calculated pi to over three trillion digits.

• Pi to 10 digits: 3.1415926535

The Greek letter π was first used to represent pi by William Jones in 1706, because π was an abbreviation of the Greek word for perimeter: "περίμετρος."

CODING:

#include<iostream.h>

#include<conio.h>

void main()

{     

int i;

double p=0;

clrscr();

for(i=1;i<=100;i++)

{

if(i%2==0)

{

p=p-(4.0/(2*i-1));

}

else

{

p=p+(4.0/(2*i-1));

}

}

cout<<"value of pi="<<p<<\"t";

getch();

}

OUTPUT:

 Scilab Programming

C ++ Programming

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