A number is known as a spy number if the sum of its digits is exactly equal to the product of its digits.
The code defines a function checkSpy
that takes an integer number
as input and returns a boolean value indicating whether number
is a spy number or not.
The function starts by initializing two variables sum
and mul
to 0 and 1, respectively. These variables will be used to keep track of the sum and product of the digits of number
.
The function then uses a while
loop to repeatedly extract the last digit of number
and update sum
and mul
accordingly. The while
loop runs until number
becomes 0.
For each iteration of the loop, the code uses the modulo operator (%
) to extract the last digit of number
, which is stored in the variable rem
. The code then adds rem
to sum
and multiplies mul
by rem
. The code uses integer division (//
) to remove the last digit of number
, and the int
function to convert the result to an integer.
After the while
loop, the code uses an if
statement to check if the sum of the digits of number
is equal to their product. If sum
is equal to mul
, the code returns True
, indicating that number
is a spy number. If sum
is not equal to mul
, the code returns False
, indicating that number
is not a spy number.
The code then asks the user to input a number, and converts the input to an integer using the int
function. The input value is then passed as an argument to the checkSpy
function.
The code uses another if
statement to check if the result of checkSpy
is True
. If checkSpy
returns True
, the code prints the message “X is a spy number”, where X is the value of number
. If checkSpy
returns False
, the code prints the message “X is not a spy number”.
The str
function is used to convert the value of number
to a string representation, so that it can be concatenated with the string literals in the print
statements.
This code demonstrates how to use a function, a while
loop, and an if
statement to determine if a number is a spy number, which is a number that has the sum of its digits equal to their product.
def checkSpy(number):
sum, mul = 0, 1
while number > 0:
rem = number % 10
sum += rem
mul *= rem
number = int(number / 10)
if sum == mul:
return True
else:
return False
number = int(input("Enter a number to check for spy number: "))
if checkSpy(number) == True:
print(str(number) + " is a spy number")
else:
print(str(number) + " is not a spy number")
Enter a number to check for spy number: 123
123 is a spy number
The code defines a function checkSpy
that takes in an integer number
as an argument and returns True
if the number is a spy number or False
otherwise.
A spy number is defined as a number where the sum and product of its digits are equal.
The function first initializes two variables sum
and mul
to 0 and 1 respectively. Then, it uses a while loop to repeatedly divide the number
by 10, until it becomes 0. At each iteration of the loop, the remainder of the division is found and added to the sum
and multiplied with the mul
. This gives us the sum and product of the digits of the number.
If the sum
is equal to mul
, the function returns True
, otherwise it returns False
.
The main part of the code then prompts the user to enter the upper bound max
for finding spy numbers. The code then uses a for loop to iterate from 1 to max
, and calls the checkSpy
function for each number. If the result of the function is True
, the number is printed as a spy number.
The end of the output is suppressed by setting end
to a space character in the print
statement, this ensures that the spy numbers are printed on the same line, separated by spaces.
def checkSpy(number):
sum, mul = 0, 1
while number > 0:
rem = number % 10
sum += rem
mul *= rem
number = int(number / 10)
if sum == mul:
return True
else:
return False
max = int(input("Enter the upper bound to find spy numbers: "))
print("Spy numbers: ")
for i in range(1, max):
if checkSpy(i):
print(i, end=" ")
Enter the upper bound to find spy numbers: 1500
Spy numbers:
1 2 3 4 5 6 7 8 9 22 123 132 213 231 312 321 1124 1142 1214 1241 1412 1421