When necessary, nuBASIC converts a numeric constant from one type of variable to another, according to the following rules:
If a numeric constant of one type is set equal to a numeric variable of a different type, the number is stored as the type declared in the variable name.

Example:
Output:

• If a string variable is set equal to a numeric value or vice versa, a "Type Mismatch" error occurs. 
• During an expression evaluation, all of the operands in an arithmetic or relational operation are converted to the same degree of precision; that is, that of the most precise operand. Also, the result of an arithmetic operation is returned to this degree of precision. 
• Logical operators convert their operands to integers and return an integer result.

A string value can be converted in a numeric value and vice versa. 
To convert a numeric value into a string value you may use Str$ built-in function 
To convert a string value you may use Val or Val% functions.