### A good answer might be:

The program prints "ello SPIM!"

# Read Integer, Print Integer

The read integer service reads an entire line of input from your keyboard—all the characters you type up to the `newline` character. These characters are expected to be ASCII digits '0', '1', .., '9' with an optional leading '-' or '+'. The characters are converted into a 32-bit two's complement representation of the integer which is returned in `$v0`.

    li      $v0,5     # code 5 == read integer
    syscall           # Invoke the operating system.
                      # Read in one line of ascii characters.
                      # Convert them into a 32-bit integer.
                      # $v0 <-- two's comp. int.

The print integer service prints the integer represented by the 32 bits in `$a0` to the SPIM terminal. Of course, there are many ways that the integer can be placed in `$a0`, not just `lw`.

    li      $v0,1     # code 1 == print integer
    lw      $a0,int   # $a0 == the integer
    syscall           # Invoke the operating system.
                      # Convert the 32-bit integer into characters.
                      # Print the character to the monitor.

### QUESTION 8:

The print integer prints an integer on the simulated monitor. But what must it do first, before printing?