std::ios_base::precision

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< cpp‎ | io‎ | ios base
 
C++
 
Input/output library
 
std::ios_base
 
streamsize precision() const;
 (1)
streamsize precision( streamsize new_precision );
 (2)

Manages the precision (i.e. how many digits are generated) of certain numeric output conversions.

1) Returns the current precision.

2) Sets the precision to the given one.

Contents

[edit] Parameters

new_precision - new precision setting

[edit] Return value

the precision before the call to the function

[edit] Example

Run this code
#include <iostream>
int main()
{
    std::cout << "The default precision is " << std::cout.precision() << '\n';
}

Output: 

The default precision is 6

[edit] See also

manages field width
(public member function)
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