As we have discussed when you declare a variable you are telling the compiler and ultimately the computer what kind of data you will be storing in the variable.

computer science

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As we have discussed, when you declare a variable you are telling the compiler—and, ultimately, the computer—what kind of data you will be storing in the variable. Each variables requires a specific amount of space to store the related information depending on the data type. For example, the following are two variable declarations that might occur in a C++ program:

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