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What does static variable mean in C?

Static variable is available to a C application, throughout the life time. At the time of starting the program execution, static variables allocations takes place first. In a scenario where one variable is to be used by all the functions (which is accessed by main () function), then the variable need to be declared as static in a C program. The value of the variable is persisted between successive calls to functions. One more significant feature of static variable is that, the address of the variable can be passed to modules and functions which are not in the same C file.

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