is_prime

  1|main:
  2|      MOV R0, #message_ask
  3|      STR R0, .WriteString
  4|      LDR R1, .InputNum //input num
  5|      CMP R1, #1
  6|      BNE if_statement
  7|      MOV R0, #message_yes
  8|      STR R0, .WriteString
  9|      STR R1, .WriteUnsignedNum
 10|      B main
 11|if_statement:
 12|      MOV R2, #2        //i
 13|Start_main_loop:
 14|      CMP R2, R1
 15|      BEQ End_main_loop
 16|      MOV R3, R1        // creating copy
 17|Remainder_Of_Divisions:
 18|      SUB R3, R3,R2
 19|      SUB R0, R2, #1
 20|      CMP R3,R0
 21|      BGT Remainder_Of_Divisions
 22|      CMP R3, #0
 23|      BNE If_staitment
 24|      MOV R0, #message_no
 25|      STR R0, .WriteString
 26|      STR R1, .WriteUnsignedNum
 27|      B main
 28|If_staitment:
 29|      ADD R2, R2, #1
 30|      B Start_main_loop
 31|End_main_loop:
 32|      MOV R0, #message_yes
 33|      STR R0, .WriteString
 34|      STR R1, .WriteUnsignedNum
 35|      B main
 36|message_yes: .ASCIZ "\nIt`s a prime number: "
 37|message_no: .ASCIZ "\nIt`s NOT a prime number: "
 38|message_ask: .ASCIZ "\nWrite number to check: "