Singular

5.1.157 typeof

Syntax:

typeof ( expression )

Type:

string

Purpose:

returns the type of an expression as string.

Returns the type of the first list element if the expression is an expression list.

Possible types are: "ideal", "int", "intmat", "intvec", "list", "map", "matrix", "module", "number", "none", "poly", "proc", "qring", "resolution", "ring", "string", "vector".

For internal use only is the type "?unknown type?".

Example:

int i=9; i; ==> 9 typeof(_); ==> int print(i); ==> 9 typeof(_); ==> string type i; ==> // i int 9 typeof(_); ==> string string s=typeof(i); s; ==> int typeof(s); ==> string proc p() { "hello"; return();} p(); ==> hello typeof(_); ==> ?unknown type?