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Why does an int take 4 bytes?
So the reason why you are seeing an int as 4 bytes (32 bits), is because the code is compiled to be executed efficiently by a 32-bit CPU. If the same code were compiled for a 16-bit CPU the int may be 16 bits, and on a 64-bit CPU it may be 64 bits.
How many bytes does an int array take up?
4 bytes
A int (typed) array uses 4 bytes to store each of its array element.
How the array elements are stored?
The important thing about arrays is that array elements are always stored in consecutive memory locations. We can verify this fact by printing the memory addresses of the elements.
How is an int array stored in memory?
An array is just a group of integer, saved in the memory as single integer, but in one row. A integer has 4-Byte in the memory, so you can access each value of your array by increasing your pointer by 4.
How does an array look in memory?
Arrays are treated the same way as objects, so where array are located in memory is straight-forward.
How much memory does the first element of an array occupy?
Its base address – address of its first element is 10000. Since it is an integer array, each of its element will occupy 4 bytes of space. Hence first element occupies memory from 10000 to 10003. Second element of the array occupies immediate next memory address in the memory, i.e.; 10004 which requires another 4 bytes of space.
How to convert an int into a 4 byte char array?
I’ll show how I resolved client-server communication, sending the actual time (4 bytes, formatted in Unix epoch) in a 1-bit array, and then re-built it in the other side. (Note: the protocol was to send 1024 bytes)
Do you need 4 bytes to hold an int?
Nit: you have no guarantee that 4 bytes are necessary and sufficient for holding an int. You need sizeof (int) bytes. To those who might encounter this post: the only correct solution is to use bit shift on unsigned types as in the accepted answer.
How is memory allocated in an integer array?
Next successive memory address is allocated to the next element in the array. This process of allocating memory goes on till the number of element in the array gets over. Below diagram shows how memory is allocated to an integer array of N elements.