What is the difference in meaning between x3 and x[3]

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What is the difference in meaning between x3 and x[3]?

Ans. If we use these two name at the time of variable declaration then these two have two different meaning.
Suppose we declare a integer type of variable like:
int x3 – this line of code will allocate a memory space with a variable name x3 of integer type.

Now suppose we declare a integer type of variable like:
int x[3] – this line of code will allocate memory for three integer type of variable with the name x. This is the concept of array.

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