value of π by Gregory-Leibniz series in fortran

An infinite sum series first given by Madhava and later rediscovered by Gregory and Leibniz is expressed as, 

∞∑n=0(-1)n2n+1=π4
or, π4=∞∑n=0(-1)n2n+1
∴
Where n  = 0,1,2,3,4,5, ..................................,  positive integer.

For n =0
\pi = 4 \times 1

For n = 0,1
   \pi = 4 \times (1- \frac{1}{3})

For n = 0,1,2
\pi = 4 \times (1 - \frac{1}{3} + \frac{1}{5})

For n = 0,1,2,3
\pi = 4 \times (1 - \frac{1}{3} + \frac{1}{5} - \frac{1}{7}) and so on.

Continuiing this process  up to n \approx \infty,  you obviously get,
   \pi =4 \times ( 1 - \frac{1}{3} + \frac{1}{5} - \frac{1}{7} + \frac{1}{9} - \frac{1}{11} + ....................)     (2)
This is called Gregory-Leibniz series to estimate value of \pi

fig. 1. n vs. \pi plot

n gives number of terms in the series. 

To get fortran code for estimation of value of \pi by using Gregory-Liebniz series, click on the given button :  Get Files



Learn to create gif animation in gnuplot software: Click Here.


Comments

These posts may also be useful for you

top 3 websites for downloading research papers for free

plot graph in gnuplot from csv and data file | knowledge of physics

projectile motion in fortran | relation of angle of projection and horizontal range

NEB physics exam numerical problems with solutions for grade 12 students

how to plot 3D and parametric graphs in gnuplot | three dimensional plot in gnuplot software

how to create GIF animation in gnuplot | animation using gnuplot software

NEB board exam maths solved problems with proper solutions - available for free | short answered mathematics problems solved group A

NEB grade 11 and 12 maths exam MCQ solved problems | NEB mathematics MCQ solved problems