The length of the character array remains the same. It is an array afterall! The problem here is with the input buffer. It might take characters more than specified at the definition of array but then, your program is likely to misbehave. We need to check for this sort of errors while writing our code. Hence we use #define to define constants fo…

variable_length_string.c

#include <stdio.h>

int main()
{
    char a[] = "hello";
    printf("%s", a);
    for( int i = 0 ; i < 4 ; i++ )
    {
        scanf("%s", a);
        printf("%s", a);    //  this will help you better understand the working
    }
    return 0;
}