C++ Math erfc()

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

Suppose a number is ‘x’:

Syntax

Parameter

x: It is a floating point value.

Return value

It returns the complementary error function value of x.

Example 1

Let’s see the simple example when the 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 -∞.

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.

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.