This Python code example illustrates how to determine whether a given number is a “spy number.” A spy number is a number where the sum of its digits is equal to the product of its digits. The code takes an input number, processes its digits, and then checks if it meets the criteria of a spy number.

```
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")
```

`checkSpy(number)`

The function `checkSpy`

takes a single integer argument, `number`

, and determines whether it is a spy number.

```
def checkSpy(number):
sum, mul = 0, 1
```

**Initialization:**Two variables,`sum`

and`mul`

, are initialized to 0 and 1 respectively.`sum`

will store the sum of the digits, and`mul`

will store the product of the digits.

`while number > 0:`

A `while`

loop is used to process each digit of the number.

```
while number > 0:
rem = number % 10
sum += rem
mul *= rem
number = int(number / 10)
```

**Remainder Calculation:**`rem = number % 10`

extracts the last digit of`number`

.**Sum and Product Update:**The extracted digit is added to`sum`

and multiplied with`mul`

.**Number Reduction:**`number = int(number / 10)`

removes the last digit of`number`

.

`if sum == mul:`

After processing all digits, the function checks if the sum of the digits equals the product of the digits.

```
if sum == mul:
return True
else:
return False
```

**Return Value:**The function returns`True`

if the number is a spy number and`False`

otherwise.

The main code segment takes an integer input from the user and calls the `checkSpy`

function.

`number = int(input("Enter a number to check for spy number: "))`

**User Input:**The user is prompted to enter a number, which is then converted to an integer.

The result of the `checkSpy`

function is used to print whether the number is a spy number.

```
if checkSpy(number) == True:
print(str(number) + " is a spy number")
else:
print(str(number) + " is not a spy number")
```

**Conditional Check:**Depending on the function’s return value, an appropriate message is printed.

This Python code example demonstrates how to find and print all spy numbers up to a given upper limit. A spy number is defined as a number where the sum of its digits equals the product of its digits. The script includes a function to check if a number is a spy number and uses a loop to find all such numbers within the specified range. This example highlights the use of loops, conditional statements, and basic arithmetic operations in Python.

```
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=" ")
```

The main code segment takes an integer input from the user and calls the `checkSpy`

function for each number up to the specified limit.

`max = int(input("Enter the upper bound to find spy numbers: "))`

**User Input:**The user is prompted to enter the upper bound, which is then converted to an integer and stored in`max`

.

`for i in range(1, max):`

A `for`

loop iterates through each number from `1`

to `max - 1`

.

```
print("Spy numbers: ")
for i in range(1, max):
if checkSpy(i):
print(i, end=" ")
```

**Range Iteration:**The loop iterates over each integer`i`

in the range from`1`

to`max - 1`

.**Spy Number Check:**The`checkSpy`

function is called for each`i`

.**Output:**If`checkSpy(i)`

returns`True`

,`i`

is printed as a spy number, with numbers separated by spaces.

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