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Functional variables |
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A functional variable is a variable of the form a(b).
The name of a functional variable is written in the form f(x1; x2;...; xn). Designations of a function and arguments may contain letters of the Latin alphabet (characters are case-sensitive), Arabic digits, and underline symbols ("_"). The variable name length is no more than 512 symbols. The first symbol in the designation of a function or argument – a character or an underline. Examples of writing: a(b), a(b_1; b_2). If necessary, you can create several functional variables with the same arguments.
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The argument name of a functional variable may coincide with the name of a user variable of a normal form. For example, a document may contain the variable b and the functional variable a(b). A variable and a same-named argument are independent values which have their own values which differ from one another. |
In the Expression cell of the Variables toolbar, corresponding to the functional variable, is introduced expression for calculating the value of the function by substituting the values of its arguments.
A functional variable has no current value.
To use a function value at a certain argument value to calculate another variable or as the boundary value of an interval, write the functional variable with an argument – a number or a constant.
For example, there is the functional variable a(b). In the expression, it is required to use the value of this variable calculated for the argument equal to 10. For that, in the expression write a functional variable in the form a(10).
