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------------------------------------------Variables:--------------------------------------------
1. These are used to store the value at certain memory location and that memory location is identified by that variable.
2. Their values can be change as per programmers need.
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Example: In following fig. the value 10 is stored in the memory which is denoted by variable 'x'.
Types of variables:
1. Local variables.
2. Global variables.
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Local Variables: 1. Those variables which is declared within the block are local variables.
2. Their accessibility is within the block only.
Global Variables: Those variables which is declared globally and accessible to all blocks of program.
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