Pointer Modify in C

Pointer increment / decrement:

• We use modify operators to increase or decrease the value of a variable by one.
• Increment operators increase the value by 1.
• Decrement operators decrease the value by 1

#include<stdio.h>
int main()
{
	int x=10, y=20;
	
	printf("x value : %d \n", x);
	printf("++x value : %d \n", ++x);
	
	printf("y value : %d \n", y);
	printf("--y value : %d \n", --y);
	return 0;
}

• When we modify a pointer variable, it is increased by size bytes.
• Char* modifies by 1 byte
• Float* modifies by 4 bytes…

#include<stdio.h>
int main()
{
	char x = 'a';
	float y = 2.3;
	double z = 4.5;
	
	char* p1 = &x;
	float* p2 = &y;
	double* p3 = &z;
	
	printf("p1 value is : %u \n", p1);
	printf("++p1 value is : %u \n", ++p1);
	
	printf("p2 value is : %u \n", p2);
	printf("++p2 value is : %u \n", ++p2);
	
	printf("p3 value is : %u \n", p3);
	printf("++p3 value is : %u \n", ++p3);
	return 0;
}