Can pointer directly store data

I do not understand how the codes below work

Code:

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#include<stdio.h>

int main ()
{
        char * p = { "Hello"};
       
        printf("%c", *p);
       
        return 0;
}

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code output : H

Pointer hold memory location of another variable. The program has a variable named pointer

"Hello" is a string constant, so it exists independently of the pointer.

Quote:

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Originally Posted by laserlight

"Hello" is a string constant, so it exists independently of the pointer.

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If the string is constant, so const is not written in the code anywhere. How do you know the string is constant

Quote:

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Originally Posted by Player777

If the string is constant, so const is not written in the code anywhere. How do you know the string is constant

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"Hello" is a string constant because it is a string constant by definition. Likewise, in this program below, 123 is an integer constant because it is an integer constant by definition, no const keyword is necessary:

Code:

---

#include <stdio.h>

int main(void)
{
    printf("%d\n", 123);
    return 0;
}

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Quote:

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Originally Posted by Player777

If the string is constant, so const is not written in the code anywhere. How do you know the string is constant

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You don't. The string literal could be constant or non-constant (it's not defined by the C Standard). But treating it as non-constant is undefined behaviour so best to just always treat it as constant