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C++ Math erf()

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

C++ Math erf() function

Syntax

Suppose a number is 'x':

Parameter

x: It is a floating point value.

Return value

It returns the error function value of x.

Parameter Return value
x=±0 ±0
x=± infinite ±1
x=nan nan

Example 1

Let's see the simple example.

Output:

Value of x is : 6.2
erf(x) : 1

In the above example, value of x is 6.2. The erf() function returns the value i.e 1.

Example 2

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

Output:

Value of x is : inf
erf(x) : 1

In the above example, the value of x is infinite. Therefore, the function erf() returns the value 1.

Example 3

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

Output:

Value of x is : 0
erf(x) : 0

In the above example, the value of x is zero. Therefore, the function erf() returns 0 value.

Example 4

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

Output:

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

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


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