This is an example in the C language iteration part, but I don't know why it doesn't work as intended.

printf ("Enter an integer\nExit Ctrl+z\n");
while (scan("%d", &val)! = EOF) //Ctrl+z Enter to exit the repeat statement
{
    if (val < min)
        min = val;
}
printf ("minimum value is %d\n", min);
return 0;