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Python Exercises: Check whether a given number is a Disarium number or unhappy number

Python Math: Exercise-88 with Solution

Write a Python program to check whether a given number is a Disarium number or unhappy number.

A Disarium number is a number defined by the following process:
Sum of its digits powered with their respective position is equal to the original number.
For example 175 is a Disarium number:
As 11+32+53 = 135
Some other DISARIUM are 89, 175, 518 etc.

Pictorial Presentation:

Python Math: Check whether a given number is a Disarium number or unhappy number.

Sample Solution-1:

Python Code:

def is_disarium(num):
    temp = 0
    for i in range(len(str(num))):
        temp += int(str(num)[i]) ** (i + 1)
    return temp == num

num = 25
print("\nIs",num,"is Disarium number?",is_disarium(num))
num = 89
print("\nIs",num,"is Disarium number?",is_disarium(num))
num = 75
print("\nIs",num,"is Disarium number?",is_disarium(num))
num = 125
print("\nIs",num,"is Disarium number?",is_disarium(num)) 
num = 518
print("\nIs",num,"is Disarium number?",is_disarium(num))

Sample Output:

Is 25 is Disarium number? False

Is 89 is Disarium number? True

Is 75 is Disarium number? False

Is 125 is Disarium number? False

Is 518 is Disarium number? True

Flowchart:

Flowchart: Check whether a given number is a Disarium number or unhappy number.

Visualize Python code execution:

The following tool visualize what the computer is doing step-by-step as it executes the said program:


Sample Solution-2:

Python Code:

def is_disarium(num):
    flag = (num == sum([int(str(num)[i-1])**i for i in range(1,len(str(num))+1)]))
    return flag

num = 25
print("\nIs",num,"is Disarium number?",is_disarium(num))
num = 89
print("\nIs",num,"is Disarium number?",is_disarium(num))
num = 75
print("\nIs",num,"is Disarium number?",is_disarium(num))
num = 125
print("\nIs",num,"is Disarium number?",is_disarium(num)) 
num = 518
print("\nIs",num,"is Disarium number?",is_disarium(num))

Sample Output:

Is 25 is Disarium number? False

Is 89 is Disarium number? True

Is 75 is Disarium number? False

Is 125 is Disarium number? False

Is 518 is Disarium number? True

Flowchart:

Flowchart: Check whether a given number is a Disarium number or unhappy number.

Visualize Python code execution:

The following tool visualize what the computer is doing step-by-step as it executes the said program:


Python Code Editor:

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Previous Python Exercise: Cap a number within the inclusive range specified by the given boundary values x and y.
Next Python Exercise: Check a number is a repdigit number or not.

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Python: Tips of the Day

Getting rid of unwanted characters:

You can get rid of whitespaces or any specific character using strip methods in Python. You can use either plain strip for both sides, lstrip for the left side and rstrip for the right side only.

str="+++Welcome python+++"
str.strip()

print(str)

Output:

+++Welcome python+++