# Convert a decimal to a hex as a string 
def decimalToHex(decimalValue):
    hex = ""
 
    while decimalValue != 0:
        hexValue = decimalValue % 16 
        hex = toHexChar(hexValue) + hex
        decimalValue = decimalValue // 16
    
    return hex
  
# Convert an integer to a single hex digit in a character 
def toHexChar(hexValue):
    if 0 <= hexValue <= 9:
        return chr(hexValue + ord('0'))
    else:  # 10 <= hexValue <= 15
        return chr(hexValue - 10 + ord('A'))

def main():
    # Prompt the user to enter a decimal integer
    decimalValue = eval(input("Enter a decimal number: "))

    print("The hex number for decimal", 
        decimalValue, "is", decimalToHex(decimalValue))
  
main() # Call the main function