This program does not work in the simulator, only in a board.
Set Accelerometer Range
Set up the part of the board that measures acceleration (how much the microbit is speeding up or slowing down), in case you need to measure high or low acceleration.
input.setAccelerometerRange(AcceleratorRange.OneG);Parameters
rangemeans the biggest number of gravities of acceleration you will be measuring (either1g,2g,4g, or8g). Any bigger numbers will be ignored by your board, both when you are picking a number of gravities, and when you are measuring acceleration.
Example
This program sets the highest acceleration that your board will measure is 4G. Then it shows acceleration from side to side until you stop the program.
input.setAccelerometerRange(AcceleratorRange.FourG);
basic.forever(() => {
basic.showNumber(input.acceleration(Dimension.X));
});