Answer:
# Algorithm to prompt user to enter a positive nonzero number
# Define a function that will validate if the number entered is positive and nonzero
validate_number()
{
# Get the number entered by the user
local number=$1
# Check if the number is greater than 0
if [[ $number -gt 0 ]]
then
# If the number is greater than 0, return 0
return 0
else
# If the number is less than 0, return 1
return 1
fi
}
# Start the loop
while true
do
# Prompt the user to enter a positive nonzero number
read -p "Please enter a positive nonzero number: " number
# Validate the number entered
validate_number $number
# Check the return value of the function
if [[ $? -eq 0 ]]
then
# If the number is valid, break from the loop
echo "Input is valid."
break
else
# If the number is invalid, display an error message
echo "Input is invalid. Please try again."
fi
done
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