SWI-Prolog -- Term Comparison

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Term Comparison

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        Term Comparison
        
        PL_compare()
        
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12.4.18.1 Term Comparison

int PL_compare(term_t t1, term_t t2): Compares two terms using the standard order of terms and returns -1, 0 or 1. See also compare/3.
int PL_same_compound(term_t t1, term_t t2): Yields TRUE if t1 and t2 refer to physically the same compound term and FALSE otherwise.