![]() ![]() You can use predefined constants and functions. For example, 2mm + 4mm is a valid expression, while 2mm + 4 is not (the reason for this is that an expression like 1in + 4 will most likely be interpreted as 1in + 4in by humans, but all units are converted to the SI system internally, and the system is not able to guess this). Operators and functions are unit-aware, and require valid combinations of units, if supplied. When the decimal marker is used, it must be followed by at least one digit. Numbers may use either a comma, or a decimal point. Numbers in an expression may have an optional unit attached to them. In addition, the expression may reference other properties, and also use conditionals. Clicking on the icon or typing the equal sign = brings up the expression editor for that particular property.Ī FreeCAD expression is a mathematical expression following notation for the standard mathematical operators and functions as described below. In the GUI, spin boxes or input fields that are bound to properties contain a blue icon. It is possible to define properties using mathematical expressions. ![]() 4.1.3 Rounding, truncation and remainder functions.4.1.2 Exponential and logarithmic functions.
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