What is pointer? Explain the meaning of each of the following declaration.

1. int*p;
2. int *p[10];

• int(*) [10]

1. int*p[void];
2. int*p(char*a);

Pointer is a variable that store memory address of another variable. It is similar to other variable but it stores address in place of data.

For example, p=&a; here, p is pointer storing memory address of a.

Meanings of declared pointer statement are:

1. Int*p;= a pointer that will point to a integer data.
2. Int*p[10];= p is 10- element array of pointer to integer data.

• Int(*p)[10];= p is a pointer to a 10-element integer data.

1. Int*p[void];= p is function that return a pointer to a integer data.
2. Int*p[char*a]; = p is a function that accepts an arguments which is a pointer to a character and returns a pointer to an integer data.

Importance of pointer is:

• It allows us to pass variable, array, function, string and structure as function argument.
• Pointer is more in handling the data table.
• They increase the execution speed of program.
• Pointer reduces the length and complexity of a program.
• It supports dynamic memory allocation memory arguments.
• The use of a pointer array to character strings results in saving of data storage space in a memory.