| Key(s) | Action |
|-----------------------|--------|
| 0–9, ., +, -, *, / | Type numbers/operators |
| Enter or = | Calculate result |
| Esc | Clear current input |
| F1 | Open help |
| Ctrl+C | Copy result |
| Ctrl+V | Paste into expression |
| M (or Ctrl+M) | Memory Store (MS) |
| R (or Ctrl+R) | Memory Recall (MR) |
Check Help → Keyboard Shortcuts inside the program for exact mapping.
Unlike traditional calculators where you had to type 2 + 2 * 4 and hope for the correct order of operations, Ultimate Calculator v1.0 allowed you to type (2+2)*4 or 2 + (2*4) naturally. It understood parentheses, brackets, and nested functions without forcing users into Reverse Polish Notation (RPN) or rigid input sequences.
Syntax examples (case‑insensitive):
