nextafter() function of math module in Python

Overview:

The nextafter() function in the math module of Python, returns the next floating point number after the begin and before the end.
If the input numbers are equal the function returns the value of the second parameter.

Example 1:

# Example Python program that finds the next floating point number
# between two given numbers
import math

def printNextFloatInRange(begin, end):
nextFloat = math.nextafter(begin, end)
print("Next floating point number after %.16f and before %.16f:"%(begin, end))
print(nextFloat)

# Next floating point in increasing range
printNextFloatInRange(1, 2.1)
printNextFloatInRange(2, 3.2)
printNextFloatInRange(3, 4)
printNextFloatInRange(3, 4.1)

# Next floating point in decreasing range
printNextFloatInRange(1, 0)

Output:

Next floating point number after 1.0000000000000000 and before 2.1000000000000001:

1.0000000000000002

Next floating point number after 2.0000000000000000 and before 3.2000000000000002:

2.0000000000000004

Next floating point number after 3.0000000000000000 and before 4.0000000000000000:

3.0000000000000004

Next floating point number after 3.0000000000000000 and before 4.0999999999999996:

3.0000000000000004

Next floating point number after 1.0000000000000000 and before 0.0000000000000000:

0.9999999999999999

Nextafter() function of math module in Python

Overview:

Example 1:

Output: