пиसंज्ञानपुंसकलिंगनिर्जीवअविकारीअर्थपाई अक्षरбукваपाई, वृत्तीय अनुपातπ; The number π is a mathematical constant that represents the ratio of a circle's circumference to its diameter, approximately equal to 3.14159.पाई संख्याчисло