Learn and Master C Programming - declaring static variables inside functions with 'static' keyword in C

The video tutorial explains the concept of static variables in programming. It demonstrates how static variables are initialized only once and retain their values between function calls, unlike local variables that are reinitialized every time. The static keyword allows a variable to behave like a global variable with local scope, making it useful in various programming scenarios. A practical example is provided to illustrate the behavior of static variables.

What happens to a local variable in a function each time the function is called?

• It is deleted after the function call.

• It is initialized to zero and incremented by one.

• It retains its previous value.

• It becomes a global variable.

What is the main advantage of using the static keyword in a function?

• It increases the execution speed of the function.

• It initializes the variable only once and retains its value.

• It allows the variable to be initialized multiple times.

• It makes the variable accessible globally.

How does a static variable behave in terms of scope?

• It is only accessible within the function it is defined.

• It behaves like a local variable with global scope.

• It can be accessed from any part of the program.

• It behaves like a global variable with local scope.

What is the output of the function when a static variable is used and the function is called multiple times?

• The variable becomes a constant.

• The variable is re-initialized each time.

• The variable is deleted after the first call.

• The variable retains its value and increments with each call.

Why is the static keyword considered useful in programming?

• It allows for faster execution of code.

• It simplifies the syntax of the code.

• It helps in managing memory more efficiently.

• It enables a variable to retain its value across function calls.