setprecision3

setprecision(3) is a manipulator in C++ that sets the number of decimal places to be displayed after the decimal point. It is often used with the iomanip header file to format output in C++ programs.

For example, if we have a float variable x with a value of 3.14159 and we use setprecision(3), the output will be 3.142 (rounded to 3 decimal places).

Here's an example code snippet:

#include <iostream>
#include <iomanip>

using namespace std;

int main() {
    float x = 3.14159;
    cout << setprecision(3) << x << endl;
    return 0;
}

Output:

3.14
``