What is Y level in Minecraft?

What is Y level in Minecraft? In Minecraft, altitude is often expressed as the bottom face of a block layer, where the lowest block that can be placed is at layer -64 and has a Y-coordinate of −64. For instance, sea level is at layer 62, while clouds appear at layer 191).

In Minecraft, altitude is often expressed as the bottom face of a block layer, where the lowest block that can be placed is at layer -64 and has a Y-coordinate of −64. For instance, sea level is at layer 62, while clouds appear at layer 191).