Question

what is the difference between 'row++, ++row' in c language??

Answer 1

row++ is called the post-increment

++row is called the pre-increment

The post-increment increments the value and returns the value before the increment.

The pre-increment increments the value and returns the value after the increment.

E.g.:

#include <stdio.h>

int main()
{
    int val = 3;
    printf("val++ = %d\n", val++); // prints 3
    printf("val = %d\n", val); // prints 4

    val = 3;
    printf("++val = %d\n", ++val); // prints 4
    printf("val = %d\n", val); // prints 4

    return 0;
}

Answer 2

row++ is post increament i.e the row value will be increrased after the current value  returned

++row is pre increament i.e the row value will be increased before the current value is returned

Answer 3

#include <stdio.h>

int main()
{
    int val = 3;
    printf("val++ = %d\n", val++); // prints 3
    printf("val = %d\n", val); // prints 4

    val = 3;
    printf("++val = %d\n", ++val); // prints 4
    printf("val = %d\n", val); // prints 4

    return 0;
}