## Overview Return true if the argument is a numerical value. ## Syntax ``` $ISNUMBER(String) ``` ## Parameters |Parameter|Type|Required|Description| |:---|:---|:---|:---| |String|Arbitrary String|Required|| ### Column Usable as Parameters |Parameter|Classification|Numerical Value|Date|Description|Check| |:---|:---|:---|:---|:---|:---| |String|Yes*1|Yes*2|Yes*3|Yes*1|Yes*3| *1: Return the result as follows based on the input value |Input value|Result| |:---|:---| |Blank|false| |Half-width numerical value only|true| |Full-width numerical value|false| |Other strings|false| *2: Always return true *3: Always return false ## Return Value If it is a numeric value, true. Otherwise, false. ### Return Value for Target Column |Target|Return Value| |:---|:---| |Classification (including title, status, manager, owner)|Display the string "True" or "False"| |Numerical Value (including work volume, progression rate, remaining work volume)|Do not display| |Date (including start and completion)|Do not display| |Description (including content)|Display the string "True" or "False"| |Check (including lock)|Check ON if true, check OFF if false| ## Usage Example ① Specify parameters by screen column name (name displayed) ### Formula  ### Parameters  ### Calculation Result