Practice how to use pointer in C

C Online Editor

#include <stdio.h>

int main() {

    int numVariable = 30;       // Declare an integer variable and assign it 30 as a value
    int *pointerVariable = &numVariable;    // Declare a pointer variable and assign it the address of 'numVariable'

    // Print the value of the variable 'numVariable'
    printf("Value of numVariable: %d\n", numVariable);

    // Print the address of the variable 'numVariable'
    printf("Address of numVariable: %p\n", &numVariable);


    // Print the address of the variable 'numVariable' using the pointer variable 'pointerVariable'
    printf("Value of pointerVariable: %p\n", pointerVariable);

    // Print the value the variable 'numVariable' using pointer variable 
    printf("Value pointed to by pointerVariable: %d\n", *pointerVariable);

    // Modify the value of 'numVariable' using the 'pointerVariable'
    *pointerVariable = 50;
    printf("New value of numVariable after modification through pointerVariable: %d\n", numVariable);

    return 0;
}