12.4.7  Converting an expression to a string: string

The string command converts an expression to a string.

• string takes one argument:
  expr, an expression.
• string(expr) evaluates expr then converts it to a string.

Example.
Input:

Output:

This is the same thing as adding the empty string to the expression:

If you want to convert an unevaluated expression to a string, you can quote the expression (see Section 6.12.4).

Example.
Input: