lrint() in C++

The lrint() function rounds the fractional value given in the argument to an integral value using the current rounding mode. This function is defined in <cmath> library. The current mode is determined by the function fesetround().

Note:This function returns the final value in long int.

Syntax

lrint(double a);
lrint(float a);

Parameter

• The lrint() function takes double or float or integer value as an argument.

Return Value

• The lrint() function rounds the fractional value given in the argument to an integral value using the current rounding mode and returns the value in a long int.
  Here, the current mode is determined by the function fesetround(). By default, the rounding direction is set to ‘to-nearest’. It can be changed using fesetround().

Error

• It is mandatory to give an argument otherwise it will give an error no matching function for call to ‘lrint()’.