 
 <prompt> Wetin be di thing wey get only one purpose? Based on di question wey dey above, write something wey contain di answer. E fit be 1 - 20 sentences. Context: <response>: The main aim of di European Central Bank, as dem talk for Article 127(1) of di Treaty on top di Functioning of di European Union, na to maintain price stability within di Eurozone. Di Governing Council for October 1998 define price stability as inflation wey dey under 2%, "a year-on-year increase for di Harmonised Index of Consumer Prices (HICP) for di euro area wey dey below 2%" and add say price stability "suppose dey maintained over di medium term". (Harmonised Index of Consumer Prices) Unlike for example di United States Federal Reserve Bank, di ECB get only one main aim but dis aim never dey defined for statutory law, and di HICP target fit be termed ad-hoc. 