Is Piwu an infinite cycle decimal?

Pi in Greek letters? π (pronounced pài) is a constant (approximately equal to 3. 14 1592654), which is the ratio of circumference to diameter. It is an irrational number, that is, an infinite cycle decimal.

In daily life, pi is usually expressed as 3. 14, which is used for approximate calculation. The fractional part 3. 14 1592654 is enough for general calculation. Even if engineers or physicists want to make more accurate calculations, they only need to take the values to a few hundred decimal places at best.

Extended data:

Around 480 A.D., Zu Chongzhi, a mathematician in the Northern and Southern Dynasties, further got the result accurate to seven decimal places, giving the insufficient approximation 3. 14 15926 and the excessive approximation 3. 14 15927, and also getting two approximate fractional values, density ratio and shrinkage ratio. Density is a good approximation of fraction. What's the ratio? A slightly accurate approximation.

17 At the beginning of the 5th century, the Arabic mathematician Cassie got the exact decimal value of pi17, which broke the record kept by Zu Chongzhi for nearly a thousand years. German mathematician ludolph van ceulen calculated the π value to 20 decimal places in 1596, and then devoted himself to it all his life, and calculated it to 35 decimal places in 16 10, and named it Rudolph number after him.

References:

Baidu encyclopedia -pi