Value of Pi(Π) up to 50 decimal places Last Updated : 12 Jul, 2025 Comments Improve Suggest changes Like Article Like Report Try it on GfG Practice Given a number N(where N <= 50), the task is to find the value of Pi (?) up to N decimals places.Examples: Input: N = 2 Output: 3.14 Input: N = 10 Output: 3.1415926536 Approach: 1. The value of ? is calculated using acos() function which returns a numeric value between [-?, ?]. 2. Since using acos(0.0) will return the value for 2*?. Therefore to get the value of ?: double pi = 2*acos(0.0); 3. Now the value obtained from above equation is estimated to N decimal digit as: printf("%.*lf\n", N, pi); Below is the implementation of the above approach: C++ // C++ program to calculate the // value of pi up to n decimal // places #include "bits/stdc++.h" using namespace std; // Function that prints the // value of pi upto N // decimal places void printValueOfPi(int N) { // Find value of pi upto // using acos() function double pi = 2 * acos(0.0); // Print value of pi upto // N decimal places printf("%.*lf\n", N, pi); } // Driver Code int main() { int N = 45; // Function that prints // the value of pi printValueOfPi(N); return 0; } Java import java.io.*; import java.text.DecimalFormat; // Java program to calculate the // value of pi up to n decimal places class GFG { // Function that prints the // value of pi upto N // decimal places static void printValueOfPi(int n) { // Find value of pi upto // using acos() function double pi = 2 * Math.acos(0.0); pi = Math.round(pi * Math.pow(10, n)) / Math.pow(10, n); // Print value of pi upto // N decimal places System.out.println(pi); } // Driver Code public static void main(String[] args) { int N = 7; // Function that prints // the value of pi printValueOfPi(N); } } // This code is contributed by AnkitRai01 Python3 # Python3 program to calculate the # value of pi up to n decimal places from math import acos # Function that prints the # value of pi upto N # decimal places def printValueOfPi(N) : # Find value of pi upto # using acos() function b = '{:.' + str(N) + 'f}' pi= b.format(2 * acos(0.0)) # Print value of pi upto # N decimal places print(pi); # Driver Code if __name__ == "__main__" : N = 43; # Function that prints # the value of pi printValueOfPi(N); # This code is contributed by AnkitRai01 C# // C# program to calculate the // value of pi up to n decimal places using System; class GFG { // Function that prints the // value of pi upto N // decimal places static void printValueOfPi(int N) { // Find value of pi upto // using acos() function double pi = 2 * Math.Acos(0.0); // Print value of pi upto // N decimal places Console.WriteLine(pi); } // Driver Code public static void Main() { int N = 4; // Function that prints // the value of pi printValueOfPi(N); } } // This code is contributed by AnkitRai01 JavaScript <script> // Javascript program to calculate the // value of pi up to n decimal places // Function that prints the // value of pi upto N // decimal places function printValueOfPi(N) { // Find value of pi upto // using acos() function let pi = 2 * Math.acos(0.0); // Print value of pi upto // N decimal places document.write(pi.toFixed(4)); } let N = 4; // Function that prints // the value of pi printValueOfPi(N); // This code is contributed by divyesh072019. </script> Output: 3.1416 Time Complexity: O(1)Auxiliary Space: O(1) Comment More infoAdvertise with us S Sid_698 Follow Improve Article Tags : Mathematical C Programs DSA Practice Tags : Mathematical Similar Reads Basics & PrerequisitesLogic Building ProblemsLogic building is about creating clear, step-by-step methods to solve problems using simple rules and principles. 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