

| Item1 | → | Real2 | 
This operation pops an item off the stack and then pushes a real number depending on the type of item it just popped off the stack. The following table describes the values you can expect to get for different types:
| Type | Value | 
|---|---|
| Real | 0 | 
| Complex | 1 | 
| String | 2 | 
| List | 5 | 
| Global Symbol | 6 | 
| Local Symbol | 7 | 
| Program | 8 | 
| Expression | 9 | 
| Integer | 10 |