C++ Math fma() Function

C++ Math fma() Function with tutorial for beginners and professionals with examples on isgreaterequal(), less(), islessequal(), islessgreater(), isunordered(), exp(), frexp(), ldexp(), log(), log10(), modf(), exp2(), expm1(), log1p(), log2(), logb(), scalbn(), scalbln() etc.

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C++ Math fma()

The function computes the expression x*y+z without losing its precision in any intermediate result.

Suppose numbers are x,y and z:

fma(x,y,z) = x*y+z;

Syntax

float fma(float x, float y, float z);
double fma(double x, double y, double z);
long double fma(long double x, long double y, long double z);
double fma(type1 x,type2 y,type3 z);

Note: If any argument is long double type, then the return type is promoted to long double. If not, then the return type is promoted to double.

Parameter

x: The value which is to be multiplied.

y: The value which is to be multiplied with x.

z: The value which is to be added with the product of x and y.

Return value

It returns the result of x*y+z.

Example 1

Let's see the simple example.

#include 
#include
using namespace std;
int main()
{
    int x= 2;
    int y=3;
    int z=4;
    std::cout << "Values of x,y,z are :" <

Output:

Values of x,y,z are :2,3,4
fma(x,y,z) : 10

In this example, fma() function computes the result of x*y+z and returns the value 10.

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