In an example method, a device presents a user interface on a touch sensitive surface of the device. The user interface includes a first portion for displaying a sequence of code and a second portion for displaying suggested segments of code. The device receives one or more character inputs in the first portion of the user interface, and determines, based on the one or more character inputs, one or more suggested segments of code. The device presents the one or more suggested segments of code in the second portion of the user interface, and receives a touch input selecting a particular suggested segment of code. The device inserts the selected suggested segment of code into the first portion of the user interface.