Manuals/calci/PI

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PI()



Description

  • This function gives the value of  .
  • The   is a mathematical constant with a value approximate to 3.14159.
  • It is denoted by the Greek letter  .
  •   is commonly defined as the ratio of a circle's circumference   to its diameter  .
  • So  , the ratio   is constant, and it is not considering the circle's size.
  •   is a transcendental number and irrational number.
  • Being an irrational number,  cannot be expressed exactly as a ratio of any two integers .
  • But we can express as the fraction   is approximate to the   value , also no fraction can be its exact value.

Examples

  1. =Pi() = 3.141592653589793
  2. =Pi()/4 = 0.785398163
  3. =Pi()/180 = 0.017453293
  4. =Pi()/(22/7) = 0.999597663
  5. =Pi()*(5^2) = 78.53981634(Area of circle with r=5)
  6. =2*Pi()*5 = 31.41592654(Circumference of a circle with r=5).

See Also

References