Symbolic Expressions in Properties Block
QFIRE Studio
supports symbolic expressions in block properties fields and the definition of symbolic variables as well.Symbolic Expressions List
Table 1, 2 and 3 show supported operators for logical, mathematical, and conditional expressions respectively.
Table 1 - Bitwise and Logical Expressions
Name | Description | Usage |
| Parentheses | Used to assign priority to specific operations. | (,) |
| Not | Returns the negated value of the argument. | !, not, -, ~ |
| Shift Right | Shifts all the bits of a binary number to the right. | >> |
| Shift Left | Shifts all the bits of a binary number to the left. | << |
| And | Returns True only if both operands are True. If one or both operands are false, the operation returns False. | And, &, && |
| Or | Returns True if at least one of the operands is True. It returns False only if both operands are False. | Or, |, || |
| Xor | The "xor" operation (exclusive OR) is a binary logical operator that returns True if the operands are different; otherwise, it returns False. | ^ |
| Equal | Returns True if the values are equal and False otherwise. | =, == |
| Different | Returns True if the values are different and False if they are the same. | !=, <> |
| Less Than | Returns True if the left value is smaller, otherwise, it returns False. | < |
| Greater Than | Returns True if the left value is greater, otherwise, it returns False. | > |
| Less Than or Equal To | Returns True if the left value is smaller or equal to the right value, otherwise, it returns False. | <= |
| Greater Than or Equal To | Returns True if the left value is greater or equal to the right value, otherwise, it returns False. | >= |
Table 2 - Mathematical Expressions
Name | Description | Usage | Result |
| Abs | Returns the absolute value of a specified number. | Abs(-1) | 1 |
| Acos | Returns the angle whose cosine is the specified number. | Acos(1) | 0 |
| Asin | Returns the angle whose sine is the specified number. | Asin(0) | 0 |
| Atan | Returns the angle whose tangent is the specified number. | Atan(0) | 0 |
| Ceiling | Returns the smallest integer greater than or equal to the specified number. | Ceiling(1.5) | 2 |
| Cos | Returns the cosine of the specified angle. | Cos(0) | 1 |
| Exp | Returns e raised to the specified power. | Exp(0) | 1 |
| Floor | Returns the largest integer less than or equal to the specified number. | Floor(1.5) | 1 |
| Log | Returns the logarithm of a specified number. | Log(1, 10) | 0 |
| Log10 | Returns the base 10 logarithm of a specified number. | Log10(1) | 0 |
| Max | Returns the larger of two specified numbers. | Max(1, 2) | 2 |
| Min | Returns the smaller of two numbers. | Min(1, 2) | 1 |
| Pow | Returns a specified number raised to the specified power. | Pow(3, 2) | 9 |
| Remainder | Calculates the remainder resulting from dividing one number by another. | 5%3 | 2 |
| Round | Rounds a value to the nearest integer or specified number of decimal places. The mid number behaviour can be changed by using EvaluateOption.RoundAwayFromZero during construction of the Expression object. | Round(3.222, 2) | 3.22 |
| Sign | Returns a value indicating the sign of a number. | Sign(-10) | -1 |
| Sin | Returns the sine of the specified angle. | Sin(0) | 0 |
| Sqrt | Returns the square root of a specified number. | Sqrt(4) | 2 |
| Tan | Returns the tangent of the specified angle. | Tan(0) | 0 |
| Truncate | Calculates the integral part of a number. | Truncate(1.7) | 1 |
Table 3 - IF Clause Expression
Usage | Result | Description |
| if(1<2,3,4) | 3 | The expression evaluates a condition and returns one of two values based on whether the condition is true or false. If the condition is true, it returns the first argument; if false, it returns the second one. |
| (x is 2) ifs(x<2,10,x>2,20,30) | 30 | The expression evaluates a condition and returns one of several values based on whether the condition is true or false. If the first condition is true, it returns the first value; if the second condition is true, it returns the second value; otherwise, it returns the default value. For example, ifs(condition1, value1, condition2, value2, defaultValue). |
Examples
In the sequence, there are some usage examples.
Not
The Symbolic Expression "Not()" acts when the argument is 0, resulting in 1. For any argument other than 0, the result is 0. Figure 1 shows some examples.
Figure 1 - Not operation
Bit Shifting
It is possible to use ">>" and "<<" to shift the values declared in the blocks. It is important to know that these values will always be displayed in integer format, thus decimal values are lost. Figure 2 shows how to use these operators.
Figure 2 - Shifting operation
About MWF
MWF is a traditional Brazilian company that provides a wide range of electronic and mechatronic products for industry sectors such as automotive, agricultural machinery and aerospace.
Contact Us
Rua Doutor Siqueira, 139 / Sala 804 Campos dos Goytacazes - RJ, Brasil
contact@mwf-technologies.com
© 2018-2026 MWF. All rights reserved.