A Sample MIPS program
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         .data
prompt:  .asciiz    "\n Please input a value for N = "
result:  .asciiz    "The sum of the integers 1 to N = "
bye:     .asciiz    "\n Good-bye!"
         .globl     main
         .text
main:
         li         $v0, 4       # System call code for Print String
         la         $a0, prompt  # load address of prompt into $a0
         syscall                 # Print the prompt message
         li         $v0, 5       # System call code for Read Integer
         syscall                 # Read N into $v0
         blez       $v0, end     # branch to end if v0 <= 0
         li         $t0, 0
loop:
         add        $t0, $t0, $v0 # Sum of integers in $t0
         addi       $v0, $v0, -1  # Decrement N
         bnez       $v0, loop     # branch to loop if v !=0

         li         $v0, 4        # System call code for Print String
         la         $a0, result   # load adress of message into $a0
         syscall                  # print the string

         li         $v0, 1        # System calll code for Print Integer
         move       $a0, $t0      # move value to be printed to $a0
         syscall                  # print sum of integers
         b          main          # branch to main

end:    li          $v0, 4        # System call code for Print String
        la          $a0, bye      # load address of message into $a0
        syscall                   # print the string

        li          $v0, 10       # System call code for terminate 
        syscall                   # return control to system