What does this code do ?

#include

int main(void)

{

unsigned int x;

unsigned int y;

// prompt user for input

printf("%s", "Enter two unsigned integers in the range 1-20: ");

scanf("%u%u", &x, &y); // read values for x and y

for (unsigned int i = 1; i <= y; ++i) { // count from 1 to y

for (unsigned int j = 1; j <= x; ++j) { // count from 1 to x

printf("%s", "@");

}

puts(""); // begin new line

}

}