Setting up Precision to given decimal point “std:setprecision()” method used along with “std:fixed” provides precision of outputting floating point numbers correct to decimal numbers mentioned in the parameter of the setprecision method. header file #include <iomanip> std:setprecision() defined no of digits in number. Without using std:fixed() method setprecision() will limit whole numbers digits to given precision. In order to print precision of decimal point both setprecision() and fixed() method using before printing values, code snippet : 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 // setprecision example #include <iostream> // std::cout, std::fixed #include <iomanip> // std::setprecision int main (){ double doubeleValue = 3.34535 ; std::cout << std::setprecision( 4 ) ; std::cout << doubeleValue<< '...