Verify that the user enters a positive value. (use a while loop)
Sure, here is an example code snippet in Python that uses a while loop to verify that the user enters a positive value:
```python
# Ask the user for input until a positive value is entered
while True:
try:
user_input = int(input("Please enter a positive number: "))
if user_input > 0:
print("You entered a positive number!")
break # Exit the loop if a positive number is entered
else:
print("Please enter a positive number.")
except ValueError:
print("Please enter a valid number.")
```
In this code, the while loop will continue asking the user for input until a positive number is entered. The code uses a try-except block to handle cases where the user enters a non-integer value.