How do I add a validity check for n on this MIPS program that if n is less than or equal to 0, your program will not calculate the result, but rather will branch to a label exit_error where an error message "The value of n must be greater than or equal to 1" will be printed

#This is a MIPS program to calculate the result #of the series: 1+2+3+...+n, where n is the user input .text main: # Print input prompt li $v0,4 # syscall code 4 for printing a string la $a0, in_prompt # assign the prompt string to a0 for printing syscall # Read the value of n from user and save to t0 li $v0,5 # syscall code 5 for reading an integer from user to v0 syscall move $t0,$v0 # assign the value of n to t0 # Initialize counter and total registers li $t1, 0 # initialize counter register, t0 li $t2, 0 # initialize total register, t1 # Main loop body loop: addi $t1, $t1, 1 # increase the value of the counter add $t2, $t2, $t1 # update the total beq $t0, $t1, exit # if the counter value is n, exit the loop j loop # exit block for printing the output exit: li $v0, 4 # syscall code 4 for printing the output string la $a0, out_string syscall # Print total li $v0, 1 # syscall code 4 for printing the integer total move $a0, $t2 # Assign the total to a0 for printing syscall li $v0,10 # syscall code 10 for terminate the execution of the program syscall .data in_prompt: .asciiz "Enter the value of n: " out_string: .asciiz "Total = "