Here is a step-by-step solution in Python:

Step 1: Define the function isDuckNumber() that takes an integer as an argument.

```python
def isDuckNumber(n):
```

Step 2: Convert the integer to a string to be able to iterate over its digits.

```python
n = str(n)
```

Step 3: Check if the first digit is zero. If it is, return False because a duck number cannot start with zero.

```python
if n[0] == '0':
return False
```

Step 4: Iterate over the rest of the digits. If any of them is zero, return True because it means the number is a duck number.

```python
for digit in n[1:]:
if digit == '0':
return True
```

Step 5: If the function hasn't returned yet, it means the number is not a duck number. So, return False.

```python
return False
```

Step 6: In the main function, ask for a positive number.

```python
n = int(input("Enter a positive number: "))
```

Step 7: Call the function isDuckNumber() with the entered number and print the result.

```python
if isDuckNumber(n):
print("The number is a duck number.")
else:
print("The number is NOT a duck number.")

Question

Here is a step-by-step solution in Python:

Step 1: Define the function isDuckNumber() that takes an integer as an argument.

```python
def isDuckNumber(n):
```

Step 2: Convert the integer to a string to be able to iterate over its digits.

```python
    n = str(n)
```

Step 3: Check if the first digit is zero. If it is, return False because a duck number cannot start with zero.

```python
    if n[0] == '0':
        return False
```

Step 4: Iterate over the rest of the digits. If any of them is zero, return True because it means the number is a duck number.

```python
    for digit in n[1:]:
        if digit == '0':
            return True
```

Step 5: If the function hasn't returned yet, it means the number is not a duck number. So, return False.

```python
    return False
```

Step 6: In the main function, ask for a positive number.

```python
n = int(input("Enter a positive number: "))
```

Step 7: Call the function isDuckNumber() with the entered number and print the result.

```python
if isDuckNumber(n):
    print("The number is a duck number.")
else:
    print("The number is NOT a duck number.")

Knowee AI · Accepted Answer