Question

What are the PI related constants in PHP

Answer 1

echo "M_PI_2 (pi/2) = " . M_PI_2 . "<br />";
echo "M_PI_4 (pi/4) = " . M_PI_4 . "<br />";
echo "M_1_PI (1/pi) = " . M_1_PI . "<br />";
echo "M_2_PI (2/pi) = " . M_1_PI . "<br />";
echo "M_SQRTPI (sqrt(pi)) = " . M_SQRTPI . "<br />";
echo "M_2_SQRTPI (2/sqrt(pi)) = " . M_2_SQRTPI . "<br />";


/*
run: 

M_PI_2 (pi/2) = 1.5707963267949
M_PI_4 (pi/4) = 0.78539816339745
M_1_PI (1/pi) = 0.31830988618379
M_2_PI (2/pi) = 0.31830988618379
M_SQRTPI (sqrt(pi)) = 1.7724538509055
M_2_SQRTPI (2/sqrt(pi)) = 1.1283791670955

*/

 

70+ SQL courses for beginners and professionals