Syntax Error
HP HP Calculator
Severity: MinorWhat Does This Error Mean?
Syntax Error means the expression you entered is not valid. You may have unmatched parentheses, an operator in the wrong place, or used an invalid function name. Check the expression and fix the formatting.
Affected Models
- HP Prime
- HP 50g
- HP 35s
- HP 12C
Common Causes
- Unmatched parentheses
- Two operators next to each other
- Invalid function name or command
- Missing arguments for a function
- Using algebraic syntax on an RPN calculator
How to Fix It
-
Check for unmatched parentheses.
Count your opening and closing parentheses — they must match.
-
Make sure you are using the correct entry mode.
HP Prime: can use algebraic or RPN. HP 50g: uses RPN by default. HP 35s: supports both — check which mode you are in.
-
Check function names.
Use the function menu keys rather than typing function names manually. This avoids typos.
Frequently Asked Questions
What is RPN?
RPN (Reverse Polish Notation) enters operands first, then the operator. Instead of 2 + 3 =, you type 2 ENTER 3 +. RPN eliminates the need for parentheses.
Does the HP Prime use RPN?
The HP Prime supports both algebraic and RPN entry. Switch between them in Settings > Entry.