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C++ Math erfc() Function

C++ Math erfc() 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 erfc()

The erfc() function computes the complementary error function value of a parameter passed to the function.

Suppose a number is 'x':

erfc(x) = 1-erf(x);

Syntax

float erfc(float x) ;
double erfc(double x) ;
long double erfc(long double x) ;
double erfc(integral x);

Parameter

x: It is a floating point value.

Return value

It returns the complementary error function value of x.

Parameter Return value
x=+∞ +0
x= -∞ 2
x=nan nan

Example 1

Let's see the simple example when the value of x is +∞.

#include 
#include
using namespace std;
int main()
{
     float x= 2.0/0.0;
     cout<<"Value of x is : "<

Output:

Value of x is : inf
erfc(x) : 0

In the above example, the value of x is positive infinite. Therefore, the function erfc() returns 0 value.

Example 2

Let's see the simple example when the value of x is -∞.

#include 
#include
using namespace std;
int main()
{
     float x= -1.0/0.0;
     cout<<"Value of x is : "<

Output:

Value of x is : -inf
erfc(x) : 2

In the above example, the value of x is negative infinite. Therefore, the function erfc() returns 2.

Example 3

Let's see the simple example when the value of x is nan.

#include 
#include
using namespace std;
int main()
{
     float x= sqrt(-2);
     cout<<"Value of x is : "<

Output:

Value of x is : -nan
erfc(x) : -nan

In the above example, the value of x is nan. Therefore, the function erfc() returns nan.


Next TopicC++ Math Functions




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