Multiple conditions inside single 'if' in SML

Question

How can multiple conditions be specified under single if? For example, consider the following java code snippet:

if(a==1 && a>b){
    //statements ;
}

How can above code be written in sml? I know that I can achieve the goal by using two if's but still if there is a method to specify in the way I want, then it will be smooth.

Warning: there is no == in SML. There is a == in OCaml that you should not use. — Str.
– Str., Commented Jan 30, 2016 at 20:35

Ionuț G. Stan · Accepted Answer · 2016-01-26 14:03:31Z

5

SML's equivalent of && is andalso. For || there is orelse:

if a = 1 andalso a > b
then (* ... *)
else (* ... *)

answered Jan 26, 2016 at 14:03

Ionuț G. Stan

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2 Comments

Ankit Shubham Over a year ago

@lonut G. Stan Do we always need to add 'else'?

John Coleman Over a year ago

@AnkitShubham SML's philosophy is strongly against overloading. and is used for defining mutually recursive functions hence not available for use as a logical operator. andalso was chosen by the developers instead. My guess is that it was felt to be too stylistically jarring to have andalso paired simply with or, so orelse what chosen instead, even though or by itself isn't used for anything.

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