Stairs are only used by people who have 2 or more floors. For one-story houses, stairs can be made but only for style. Not in accordance with the function of the staircase itself. But actually it's fine.

The design of the stairs is of many kinds, there are those that stretch straight up to the top, some are winding, some are forming right angles. The material also varies, some from wood, bamboo, cement and others. It's all up to your wishes.