About Solve Block Variables
When you define variables inside a solve block, the following rules apply:
• You can only use the definition operator to define variables inside solve blocks, but you cannot use the global definition operator for such definitions.
• When you use the definition operator to assign a value to a variable, the assignment is limited to inside the solve block. The assigned value can be a number or a previously defined solve block variable.
• You can use the definition operator to assign the output of a solve block function to a variable. Such assignment is recognized inside and outside the solve block.
For example, in the solve block below:
• The definition operator is used to define the guess value variables x, y, and z.
• Three equations are used to define the constraints.
• The solve block function Find is used to find the solution that fits the constraints.
• The definition operator is used to assign the output of Find to variable vec.
• The guess values are evaluated at the bottom of the solve block.
Evaluating the solve block variables outside the solve block shows that:
• Variable vec is defined and returns the same result inside and outside the solve block.
• Variables x, y, and z are undefined outside the solve block, and evaluating them returns a similar error message.
