Variables can be useful because they hold a certain number/data value that can easily be accessed and changed. For example, in a game, a players score is a variable that changes as the player gets more points; ie coins, items, etc.
Answer:
Charles Babbage
Explanation:
Analytical engines were presumed to be the first general-purpose computer which was designed sometime in the 19th century by Charles Babbage - a British mathematician and inventor. A series of punch cards was used by Charles Babbage in his design of the engine. These punch cards were used for various operations such as arithmetical operations, numerical constants and other operations such as load and store.
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