Standard ML - Code Examples

Code Examples

Snippets of SML code are most easily studied by entering them into a "top-level", also known as a read-eval-print loop. This is an interactive session that prints the inferred types of resulting or defined expressions. Many SML implementations provide an interactive top-level, including SML/NJ:

$ sml Standard ML of New Jersey v110.52 -

Code can then be entered at the "-" prompt. For example, to calculate 1+2*3:

- 1 + 2 * 3; val it = 7 : int

The top-level infers the type of the expression to be "int" and gives the result "7".

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