UNO R3 with Cable in Pakistan

The Arduino Uno is a microcontroller board based on the ATmega328. Arduino is an open-source, prototyping platform and its simplicity makes it ideal for hobbyists to use as well as professionals. The Arduino Uno has 14 digital input/output pins (of which 6 can be used as PWM outputs), 6 analog inputs, a 16 MHz crystal oscillator, a USB connection, a power jack, an ICSP header, and a reset button. It contains everything needed to support the microcontroller; simply connect it to a computer with a USB cable or power it with an AC-to-DC adapter or battery to get started. The Arduino Uno differs from all preceding boards in that it does not use the FTDI USB-to-serial driver chip. Instead, it features the Atmega8U2 microcontroller chip programmed as a USB-to-serial converter.
Install the Arduino Desktop IDE
To get step-by-step instructions select one of the following links accordingly to your operating system.

Windows
Mac OS X
Linux
Portable IDE(Windows and Linux)

Choose your board in the list here on the right to learn how to get started with it and how to use it on the Desktop IDE.