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Adding Variables to Command Blocks

Mojang, please add variables to Minecraft. You programmers, developers, you know what it is. You are welcome. For example: pos (position) = testfor @p and pos = position of the nearest. The brackets indicate what needs to be calculated. There may be level, health, hunger and other indicators. Putting them up is simple: execute @a pos ... Please Mojang add this to both computers and phones !!!
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    Registered User commented
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    Variables and data storage are already available in a variety of forms—it's up to you to decide which is the best for the job.

    For numerical formats, scoreboards are the best tool because they support mathematical operations like +, −, ×,÷, and modulus (%).

    If you need to store strings, the probably best way is to use Minecraft's built in free store:

    /data merge storage namespace:myarea {MyString:'this is a test string'}

    There are probably other ways to store data too, like by setting blocks in your world, or modifying item data.

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    Registered User commented
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    yah but why can't we have specific variables that can be directly put into the place of numbers like  in /tp @p 10 75 variable name to make the player teleport to 10 75 and then to the variables value as the Z value