.data
SumOfN:	.word 	
	.text
	
Start:
	li $t2, 7     #going to compute the sum of n=6
	
	move $a0, $t2  #load parameter register with n
	jal SumN_0	#call Sum of N procedure
	sw $v0, SumOfN  #Store the return value somewhere
	
	lw $a0, SumOfN  #Print result to show it works
	li $v0, 1
	syscall
	
	li $v0, 10
	syscall 		

#Sum of N procedure
SumN_0:
	move $s1, $a0
	move $s2, $s1
	sub $s1,$s1,1
SumN_1:	beqz $s1, SumN_3
	add $s2, $s2, $s1
	sub $s1, $s1, 1
	b SumN_1				
SumN_3: move $v0,$s2
	jr $ra