Pointer to Pointer in C Programming

Pointer to Pointer in C Programming

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Declaration :

int  **ptr2ptr ;      // Double Pointer

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Consider the Following Example :

int n = 45 , *ptr , **ptr2ptr ;
ptr = &n;
ptr2ptr = &ptr;

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What is Pointer to Pointer ?

1. Double (**)  is used to denote the double Pointer
2. Pointer Stores the address of the Variable
3. Double Pointer Stores the address of the Pointer Variable

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Statement	What will be the Output ?
*ptr	45
**ptr2ptr	45
ptr	&n
ptr2ptr	&ptr

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Notes :

1. Conceptually we can have Triple ..... n pointers 
2. Example : *****n,****b can be another example
   

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Tags / Keywords : | Pointer : Double Pointer

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