# initialise array
.text
main: la $t0,array
 li $s2,1
 li $s4,20
loop: bgt $s2, $s4, end
sw $s2,0($t0)
addi $s2, $s2, 1
addi $t0, $t0, 4
j loop
end:
 li $v0,10
 syscall
 .data
nl: .asciiz "n"
 .word 255 # give a recognisable bit pattern
array: .space 80

# initialise array
    .text
main:   la $t0,array
    la $t1,sum
    li $s2,1
        li $s4,20
loop:   bgt $s2, $s4, end
    sw $zero,0($t0)
    add $s3,$s2,$t0
    sw $s3,0($t1)
        sw $s2,0($t0)
    addi $s2, $s2, 1
    addi $t0, $t0, 4
    addi $t1, $t1, 4
        j loop
end:
    li  $v0, 1
    lw $s3, 0($t1)
    add $a0, $s3, $zero  # print final value in sum
    syscall
        li $v0,10
        syscall
       .data
nl:      .asciiz "n"
    .word 255 # give a recognisable bit pattern
array:  .space 80
sum:    .space 80