Python math.erfc() Method with Examples

math.erfc() Method in Python:

The math.erfc() method returns a number’s complementary error function.

This method accepts values between – inf and + inf and returns between 0 and 2.

Syntax:

math.erfc(x)

Parameters

x: This is Required. It is a number used to calculate the complementary error function of

Return Value:

Returns a float value that represents a number’s complementary error function.

Examples:

Example1:

Input:

Given Number = 0.35

Output:

The given number's { 0.35 } complementary error function =  0.6206179464376897

Example2:

Input:

Given Number = -5.6

Output:

The given number's { -5.6 } complementary error function =  1.9999999999999976

math.erfc() Method with Examples in Python

• Using Built-in Functions (Static Input)
• Using Built-in Functions (User Input)

Method #1: Using Built-in Functions (Static Input)

Approach:

• Import math module using the import keyword.
• Give the number as static input and store it in a variable.
• Pass the given number as an argument to the math.erfc() function to get the given number’s complementary error function.
• Store it in another variable.
• Print the complementary error function of the given number.
• The Exit of the Program.

Below is the implementation:

# Import math module using the import keyword
import math
# Give the number as static input and store it in a variable.
gvn_numb = 0.35
# Pass the given number as an argument to the math.erfc() function to get
# the given number's complementary error function.
# Store it in another variable.
rslt = math.erfc(gvn_numb)
# Print the complementary error function of the given number.
print("The given number's {", gvn_numb,
      "} complementary error function = ", rslt)

Output:

The given number's { 0.35 } complementary error function =  0.6206179464376897

Similarly, try for other numbers.

import math
gvn_numb = -1
rslt = math.erfc(gvn_numb)
print("The given number's {", gvn_numb,
      "} complementary error function = ", rslt)

Output:

The given number's { -1 } complementary error function =  1.842700792949715

Method #2: Using Built-in Functions (User Input)

Approach:

• Import math module using the import keyword.
• Give the number as user input using the float(input()) function and store it in a variable.
• Pass the given number as an argument to the math.erfc() function to get the given number’s complementary error function.
• Store it in another variable.
• Print the complementary error function of the given number.
• The Exit of the Program.

Below is the implementation:

# Import math module using the import keyword
import math
# Give the number as user input using the float(input()) function and store it in a variable.
gvn_numb = float(input("Enter some random number = "))
# Pass the given number as an argument to the math.erfc() function to get
# the given number's complementary error function.
# Store it in another variable.
rslt = math.erfc(gvn_numb)
# Print the complementary error function of the given number.
print("The given number's {", gvn_numb,
      "} complementary error function = ", rslt)

Output:

Enter some random number = -5.6
The given number's { -5.6 } complementary error function = 1.9999999999999976