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For any type T, the type T[n] is an array of n Ts. If n is known at compile time, the array is fixed-length and the compiler will allocate n * sizeof(T) bytes to the array name. If n is not known at compile time, the array is variable-length and the programmer must manually request n * sizeof(T) bytes from the system at runtime, storing the start address in a pointer. The programmer must keep track of the stored address at all times and must release the memory as soon as it is no longer required.

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