Simple MIPS counter

This a simple MIPS program. User is asked for a number. If user gives a number from 1 to 20 then the program prints all the numbers from 1 to the number the user inputed.
If user gave a number out of range program asks again for a valid number.
The same program in C is here.

.data
str1: .asciiz " Please give an integer from 1 to 20 : "
errormsg: .asciiz " Out of range (1-20). \n"
nline: .asciiz "\n"   #new line
.text
error: 
li $v0,4
la $a0,errormsg
syscall       #print error msg
j get
.globl main          # label "main" must be global
main:
addi $s0,$zero,21  #s0=21
get:
li $v0,4
la $a0,str1
syscall           #print string1
li $v0,5
syscall           #read int
slt $s1,$v0,$s0      #$s1=($v0<$s0) if(x<21) $s1=1
beq $s1,$zero,error  #if $s1=0 goto error
blez $v0,error      #if ($v0<=0) goto error
move $t0,$v0
add $t1,$0,$0
loop:
addi $t1,$t1,1      #$t1++
li $v0,1
move $a0,$t1
syscall           #print int
li $v0,4
la $a0,nline
syscall           #print nline
slt $t2,$t1,$t0      #$t2=($t1<$t0)
bnez $t2,loop      #if $t2!=0 goto loop
li $v0,10       #exit program
syscall

Example of output is:

Please give an integer from 1 to 20: 35 Out of range (1-20).
Please give an integer from 1 to 20: -5 Out of range (1-20).
Please give an integer from 1 to 20: 5
1
2
3
4
5

I hope that this post was helpful for you. Maybe you would like to see MIPS Bubble sort.