Use a basic for-range loop

  - 
  
 assignStep 
 : 
  
 assign 
 : 
  
 - 
  
 sum 
 : 
  
 0 
 - 
  
 loopStep 
 : 
  
 for 
 : 
  
 value 
 : 
  
 v 
  
 # required, v = 1, 2, …, 9 
  
 range 
 : 
  
 [ 
 1 
 , 
  
 9 
 ] 
  
 # inclusive beginning and ending values 
  
 steps 
 : 
  
 - 
  
 sumStep 
 : 
  
 assign 
 : 
  
 - 
  
 sum 
 : 
  
 ${sum + v} 
  
 # v = 1, 2, … 9 
 - 
  
 returnStep 
 : 
  
 return 
 : 
  
 ${sum} 
  
 # sum is 45