fact without recur

.data
num:    .word 6              # Number for factorial
fact:   .word 0              # Store result

.text
_start:
    la      x5, num          # Load address of num
    lw      x5, 0(x5)        # Load num into x5

    li      x6, 1            # Initialize result to 1

factorial_loop:
    li      x7, 0            # Load 0 for comparison
    bne     x5, x7, multiply # If x5 != 0, jump to multiply

    j       end_loop         # If x5 == 0, exit loop

multiply:
    mul     x6, x6, x5       # result *= n (x5)
    addi    x5, x5, -1       # n--
    j       factorial_loop   # Loop again

end_loop:
    la      x8, fact         # Load address of fact
    sw      x6, 0(x8)        # Store result in memory