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Python log2

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The Python log2 function is one of the Python Math functions used to calculate the logarithmic value of a given number of base 2. In this section, we discuss how to use log2 function in Python Programming language with example.

The Python log2 function is more accurate than math.log(x, 2). Please refer to the Python log article to understand the log function.

Syntax of a Python log2 Function

The syntax of the log2 Function in Python Programming Language is

math.log2(number);

Number: A valid numerical expression and

  • If the number argument is a positive number, the log2 function returns the output.
  • If the number argument is a Negative number or Zero, log2 function returns ValueError.
  • And if it is not a number, log2 function return TypeError.

Python log2 Function Example

The Python log2 Function calculates the logarithmic value of a given number of base 2. In this example, We are going to check the base 2 logarithmic value with different data types and display the output.

# Python LOG2 Function

import math

Tup = (10, 20, 30, -40 , 50) # Tuple Declaration
Lis = [-1, 2, 3.5, -43 , 50] # List Declaration

print('Logarithm value of Positive Number = %.2f' %math.log2(5))
print('Logarithm value of Positive Decimal = %.2f' %math.log2(2.5))

print('Logarithm value of Tuple Item = %.2f' %math.log2(Tup[2]))
print('Logarithm value of List Item = %.2f' %math.log2(Lis[2]))

print('Logarithm value of Multiple Number = %.2f' %math.log2(2 + 7 - 5))
print('Logarithm value of String Value = ', math.log2('Python'))

OUTPUT

Python LOG2 Function

ANALYSIS

  1. Within the first two statements, We used the log2 Function directly on Positive integer and Decimal values.
  2. Next two statements, We used the log2 Function on Tuple and List items. If you observe the above screenshot, the log2 function is calculating the logarithm value of base 2.
  3. Next statement, We tried Python log2 Function with multiple values
  4. Next, We tried log2 Function on the String value, and it returns TypeError: a float is required as output
  5. Here, We tried log2 Function on Zero value. As we said before, this is returning ValueError: math domain error as output
  6. Last, We tried log2 Function on Negative value. As we said before, it returns ValueError: math domain error as output