Movement

Movement is a game mechanic which allows the player to travel from one block to another. There are several modes of movement in Minecraft Pocket Edition.

Walking
Walking is the most basic form of movement in Minecraft PE. The Player can walk by pressing the forward, backward, left or right keys on the D-Pad.

Sprinting
The Player can sprint by double tap the 'forward' key twice. It allows the player to move at double the speed of walking. It also allows the player to jump upto 4 blocks. The Player can only sprint when the hunger bar is above 40%.

Sneaking/Crouching
The Player can sneak by pressing the key between the walking buttons. It allows the player to move slowly, and doesn't allow the player to fall of ledges. It also makes the gamertag less visible.

Minecarts
The Player can also travel through Minecarts. Minecarts have to be placed on Rails, and the player can move by pressing the forward button. The Minecart will speed up if on a Powered Rail, but may derail if too fast.

Boats
Boats can be used as a fast and efficient way to travel across large stretches of water. The player can move by pressing the forward button, and speed up by pressing both forward buttons at the same time.

Trivia

 * In the earlier versions, walking was the only way to move in Minecraft PE.
 * Sneaking and Sprinting were added in Update 0.12.1.