what is difference between global variable and static variable in the context of life

I am not clear about the life time of global variable and static variable I think both initialize only once and stay alive for life time of program

what is difference between global variable and static variable in the context of life time

Edit : static may be local or global. What is difference between local static and global static variable. I think the difference is only with the scope not in life time

Code:

---

int a;
static int b;
void foo ( ) {
    static int c;
}

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All have a lifetime the same as the program.
All are default initialised to 0, unless you provide some other initialiser.

Then
a is visible to the entire program.
b is visible to all the functions in the current source file that appear after the definition of b.
c is visible only to the function in which it is defined.

Quote:

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Originally Posted by Salem

Code:

---

int a;
static int b;
void foo ( ) {
    static int c;
}

---

.

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Thank you salem

modified version

Code:

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int a; //Global variable


static int b; // Static Global variable
void foo ( ) {
    static int c; //Static local variable
}


int main (){
    foo();
       
        return 0;
        }

---

All have a lifetime the same as the program.
All are default initialised to 0, unless you provide some other initialiser.

Then
a is visible to the entire program.
b is visible to all the functions in the current source file that appear after the definition of b.
c is visible only to the function in which it is defined