Python Program for ldexp() Function

In the previous article, we have discussed Python Program for isnan() Function
ldexp() Function in Python:

The inverse of math.frexp() is returned by the math.ldexp() method, which returns x * (2**i) of the given numbers x and i. ().

For example:

Let x= 3, i=4

Then math.ldexp(x, i) = 3*(2**4) = 48

Syntax:

math.ldexp(x, i)

Parameters:

x: This is required. A number that is either positive or negative. It returns TypeError if the value is not a number.

i: This is required. A number that is either positive or negative. It returns TypeError if the value is not a number.

Return value: It returns the value of x * (2**i)

Examples:

Example1:

Input:

Given x value = 3
Given i value = 4

Output:

The value of given  x * (2**i) = 48.0

Example2:

Input:

Given x value = 5
Given i value =  6

Output:

The value of given x * (2**i) = 320.0

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

Approach:

Import math module using the import keyword.
Give the list as static input and store it in a variable.
Give the first number as static input and store it in another variable.
Give the second number as static input and store it in another variable.
Apply math.ldexp() function to the given first and the second number to get the value of the given first number*(2**second number) from the above-given formula x * (2**i)
Store it in another variable.
Print the above result which is the result after applying math.ldexp() function.
Give the number as static input and store it in another variable.
Apply math.ldexp() function to the given list element and above-given number and print it.
The Exit of Program.

Below is the implementation:

# Import math module using the import keyword.
import math
# Give the list as static input and store it in a variable.
gvn_lst = [1, 4, 2, 0]
# Give the first number as static input and store it in another variable.
gvn_numb1 = 3
# Give the second number as static input and store it in another variable.
gvn_numb2 = 4
# Apply math.ldexp() function to the given first and the second number to get
# the value of the given first number*(2**second number) from the above given
# formula x * (2**i)
# Store it in another variable.
rslt = math.ldexp(gvn_numb1, gvn_numb2)
# Print the above result which is the result after applying math.ldexp() function.
print(
    "The value of given first number*(2**second number) = ", rslt)
# Give the number as static input and store it in another variable.
gvn_numb3 = 2
# Apply math.ldexp() function to the given list element and above given number
# and print it.
print(
    "The value of given list element *(2** above given number ) = ", math.ldexp(
        gvn_lst[2], gvn_numb3))

Output:

The value of given first number*(2**second number) =  48.0
The value of given list element *(2** above given number ) =  8.0

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

Approach:

Import math module using the import keyword.
Give the list as user input using list(),map(),input(),and split() functions.
Store it in a variable.
Give first and second numbers respectively as user input using int(), map(), input(), and split()
functions.
Store them in two separate variables.
Apply math.ldexp() function to the given first and the second number to get the value of the given first number*(2**second number) from the above-given formula x * (2**i)
Store it in another variable.
Print the above result which is the result after applying math.ldexp() function.
Give the number as user input using the int(input()) function and store it in another variable.
Apply math.ldexp() function to the given list element and above-given number and print it.
The Exit of Program.

Below is the implementation:

# Import math module using the import keyword.
import math
# Give the list as user input using list(),map(),input(),and split() functions.
# Store it in a variable.
gvn_lst = list(map(int, input(
    'Enter some random List Elements separated by spaces = ').split()))
# Give first and second numbers respectively as user input using int(),map(),input(),and split()
# functions and store them in two separate variables.
gvn_numb1, gvn_numb2 = map(int, input(
    "Enter two random numbers separated by spaces = ").split())
# Apply math.ldexp() function to the given first and the second number to get
# the value of the given first number*(2**second number) from the above given
# formula x * (2**i)
# Store it in another variable.
rslt = math.ldexp(gvn_numb1, gvn_numb2)
# Print the above result which is the result after applying math.ldexp() function.
print(
    "The value of given first number*(2**second number) = ", rslt)
# Give the number as user input using the int(input()) function and store it in another variable.
gvn_numb3 = int(input("Enter some Random Number = "))
# Apply math.ldexp() function to the given list element and above given number
# and print it.
print(
    "The value of given list element *(2** above given number ) = ", math.ldexp(
        gvn_lst[3], gvn_numb3))

Output:

Enter some random List Elements separated by spaces = 3 0 2 1
Enter two random numbers separated by spaces = 5 6
The value of given first number*(2**second number) = 320.0
Enter some Random Number = 7
The value of given list element *(2** above given number ) = 128.0

Read all the mathematical functions available in Python and understand how to implement them in your program by using the tutorial of Python Mathematical Methods Examples.