Square root in C++ programming language

Question

please help. what is the syntax to write the square root of the following √4*3.142*A in c plus plus programming language. A is a variable.

Hi Michael! Welcome to SO! Before asking a question, you need to show us that you've put some effort into finding a solution. What research have you done? Where did it lead you? Where did you get stuck? — scohe001, Aug 07 '15 at 20:49
also see http://stackoverflow.com/questions/1727881/how-to-use-the-pi-constant-in-c — 1010, Aug 07 '15 at 20:50
@RogueBaneling Or the even better reference: http://en.cppreference.com/w/c/numeric/math/sqrt — πάντα ῥεῖ, Aug 07 '15 at 20:51
@πάνταῥεῖ That's the reference for the C `sqrt`/`sqrtl`/`sqrtf`. Here's the corresponding page for C++: http://en.cppreference.com/w/cpp/numeric/math/sqrt — Emil Laine, Aug 07 '15 at 20:59
Hi Michael! Always feel free to search StackOverflow or the internet before posting. Often, you can save yourself a lot of effort and time by doing so. — Thomas Matthews, Aug 07 '15 at 21:35

score 4 · Answer 1 · answered Aug 07 '15 at 20:49

4

you can easily use sqrt(4*3.142*A) but don't forget to add this first #include<cmath>

answered Aug 07 '15 at 20:49

Andrew Meleka

93
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10

score 0 · Answer 2 · answered Aug 08 '15 at 03:03

0

****we have function for sqrt provided in math library.****
#include <iostream>
#include<math.h>

using namespace std;


int main()
{
// √4*3.142*A
    int A =10;
    float result = sqrt(4*3.14*A);
    cout<<result<<endl;
 }

result==11.2071

answered Aug 08 '15 at 03:03

Ccr

686
7
25

Square root in C++ programming language

2 Answers2