The original version, retroactively known as version one, supported the commands codice_3, codice_4, codice_5, codice_6, codice_7, codice_8, codice_9, codice_10, codice_11, codice_12, codice_13, and codice_14. It included basic math instructions, , , and , as well as the up-arrow for exponents "...since on a teletype typewriter it is impossible to print superscripts.". In modern varieties, the up-arrow is normally replaced by the "hat" character, . Exponents took the absolute value of the number before calculation, so to calculate , one had to use . There was a further problem in the exponent function that treated as as opposed to the correct order of operations , which was not corrected until the third release. The codice_15 function always truncated towards zero.