# Compute n-factorial for a value of n entered by the user

# Read the value of n from the user
n = int(input("Enter an integer (0 or greater): "))

# Initialize factor and product
product = 1
factor = n

# Compute the factorial by performing one multiplication per loop iteration
# While the factor is greater than 0
while factor > 1:
  # Multiply the product by the factor
  product = product * factor

  # Reduce factor by 1
  factor = factor - 1

# Display the result
print(n, "factorial is equal to", product)