The command blocks act as cheat codes for Minecraft. You can use them to accomplish almost any task. Command blocks have been used by players to build working computers and televisions in the past.
There are two types of command blocks for Minecraft. The default command block is the impulse command block. When activated, it executes only once. The chain command block is the second type. This is how you can use it in Minecraft.
You cannot obtain command blocks in Minecraft from the rest of the world. They are not available in Creative. Without the use of commands, they won't be found in vanilla Minecraft.
To get a command block, use the command “/give @s command_block”, or “/setblock / command_block”. A chain command block is the exact opposite of an impulse command bloc.
When activated, impulse command blocks only will execute once. Every time a chain command block is activated, it will execute. Triggering is the process of determining whether or not a block has executed its command.
If a chain command block has been activated, it will determine if it is in “Conditional mode” and if it has not been executed successfully. If it hasn't, the command will execute the command to trigger the next chain command block. If the “Delay in Ticks” setting is not zero, there may be a delay in Bedrock Edition.
This can be used as a way to set up a series of commands that are activated in sequence. This is how players can use them to repeatedly do the same thing or keep it going.
Without permissions being granted by the operator, command blocks cannot be broken in Survival or Creative Minecraft. They are non-flammable and have the same blast resistance of bedrock so they are indestructible.