Question

In Scheme, the form (symbol-length? 'James) will return: Group of answer choices 0 5 6 error message

Answer 1

In Scheme, (symbol-length? 'James) will result in an error message because the 'symbol-length?' procedure is not defined. To obtain the length of a symbol, you must convert it to a string and then measure the string length, resulting in 5 for 'James'.

Step-by-step explanation:

In Scheme, a Lisp dialect used in computer programming, there is no built-in procedure called symbol-length?. If you try to evaluate the form (symbol-length? 'James) you will receive an error message, because Scheme does not know how to handle this undefined procedure.

To find the length of a symbol, you first need to convert the symbol to a string using the symbol->string procedure, and then you can get the length of that string using the string-length procedure. Therefore, the correct form to get the length of the symbol 'James would be (string-length (symbol->string 'James)), which would return 5, since 'James' contains 5 characters.

So, to answer your question, the form (symbol-length? 'James) would result in an error message because symbol-length? is not defined. The correct form to use to get the length of a symbol as a string is (string-length (symbol->string 'placeholder)), where 'placeholder' is the symbol you're interested in. For 'James', the correct form will return 5.

Answer 2

an error message

Step-by-step explanation:

The return value is the value which is sent back by the function to a place in the code from where the
`\text{function}` was called from. Its main work is to return a value form the function.

In the context, the form of "(symbol-length? 'James)" in Scheme will return the value --- ' an error message'.