write a programming code for Arduino IDE, using an Arduino Uno for a Smart Walking Stick for visually impaired people. The Programming must include the following components:   An Arduino Uno. Water Detection Sensor Ultrasonic sensor (HCSRO4) Infrared Proximity sensor A Mini breadboard. A 9-volt battery. A 9-volt battery connector. DC male power jack. A Buzzer. Some Jumper wire. A vibrator motor A Toggle switch.  LEDS The smart blind stick MUST automatically detect the obstacle in front of the person and give them a response to the person by vibrating the stick and also with a warning sound. Please also make sure the programming includes detection of water on the ground Through this, the blind person can aware about the obstacles in front of him.

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Variables and Constant

Constants and variables are widely used in mathematical equations and expressions. They are also commonly found in the domain of programming, where each language has its own way to differentiate between a constant and a variable. Since they have all sorts of applications, knowing their differences is a good place to start.