C++ nearbyint()

The nearbyint() function returns the argument rounded to the closest integer as a floating-point value, according to the current rounding method.

Syntax

nearbyint(value)

The value parameter represents a positive or negative floating-point value. The current rounding method, as described by fegetround(), determines which direction the value is rounded. By default, the rounding direction is set as FE_TONEAREST.

Example

The following example returns the nearby integer of 1.5:

#include <iostream>
#include <cmath>

int main() {
  double value = 1.50;
  int result;
  result = std::nearbyint(value);

  std::cout << "Nearest value is " << result << "\n";
  // Output: Nearest value is 2
}

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This will produce the following output:

Nearest value is 2

Codebyte Example

The following example returns the nearby integer of 2.9:

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