The expr utility requires an operator to perform a calculation. Without an operator (like + , - , * , or / ), the command will typically return an error or simply print the first number, depending on the specific shell environment. Potential Calculations
In modern scripting (like Bash), it is often more efficient to use Arithmetic Expansion —for example: $((937808300 + 932955077)) . expr 937808300 932955077
Note: expr performs integer division, so it discards the remainder. Usage Tips The expr utility requires an operator to perform