Introduction to Sensing Blocks

Sensing blocks are the blocks that detect things. There are 21 Sensing blocks in Scratch 3.0.

Scratch 3.0 has the following three Sensing Stack blocks:

• — An input box appears — you type the value in and it stores the value in the answer variable.

• — Resets the timer.

• — Sets the sprite to draggable or not draggable.

Scratch 3.0 has the following five Sensing Boolean blocks:

• — The condition for checking if the sprite is touching the mouse-pointer or another sprite.

• — The condition for checking if the sprite is touching a specific color.

• — The condition for checking if a color on the sprite is touching a specific color.

• — The condition for checking if the specified key is being pressed.

• — The condition for checking if the mouse is down.

Scratch 3.0 has the following ten Sensing Reporter blocks:

• — The distance from the sprite to the mouse-pointer or another sprite.

• — The most recent input with the block.

• — The mouse-pointer’s X position.

• — The mouse-pointer’s Y position.

• — How loud the noise is that the microphone is sensing.

• — How much time has passed since the Scratch program was opened or the timer reset.

• — The X position, Y position, direction, costume, size or volume of the Stage or a sprite.

• — The specified time unit selected.

• — The number of days since 2000.

• — The username of a user.