# Ruby | BigDecimal PI() function

• Last Updated : 06 Dec, 2019

BigDecimal#PI() : PI() is a BigDecimal class method which returns the value of pi to the specified number of digits of precision, numeric.

Syntax: BigDecimal.PI()

Parameter: BigDecimal values

Return: the value of pi to the specified number of digits of precision, numeric.

Example #1 :

 `# Ruby code for BigDecimal.PI() method`` ` `# loading library``require ``'bigdecimal'``require ``'bigdecimal/util'`` ` `require ``"bigdecimal/math"`` ` `include BigMath`` ` `# declaring bigdecimal``a = BigMath.``PI``(``10``).to_s`` ` `# declaring bigdecimal``b = BigMath.``PI``(``102``).to_s`` ` `# declaring bigdecimal``c = BigMath.``PI``(``2``).to_s`` ` `# PI() method``puts ``"BigDecimal a PI method : #{a}\n\n"`` ` `puts ``"BigDecimal b PI method : #{b}\n\n"`` ` `puts ``"BigDecimal c PI method : #{c}\n\n"`

Output :

```BigDecimal a PI method : 0.3141592653589793238462643388813853786957412E1

BigDecimal b PI method : 0.3141592653589793238462643383279502884197169399375105820974944592307816406286208998628034825342117067982148086513282306913173228884424E1

BigDecimal c PI method : 0.31415926535897932388671233672993238433E1```

Example #2 :

 `# Ruby code for BigDecimal.PI() method`` ` `# loading library``require ``'bigdecimal'``require ``'bigdecimal/util'`` ` `require ``"bigdecimal/math"`` ` `include BigMath`` ` `# declaring bigdecimal``a = BigMath.``PI``(``78``).to_s`` ` `# declaring bigdecimal``b = BigMath.``PI``(``12``).to_s`` ` `# declaring bigdecimal``c = BigMath.``PI``(``1``).to_s`` ` `# PI() method``puts ``"BigDecimal a PI method : #{a}\n\n"`` ` `puts ``"BigDecimal b PI method : #{b}\n\n"`` ` `puts ``"BigDecimal c PI method : #{c}\n\n"`

Output :

```BigDecimal a PI method : 0.31415926535897932384626433832795028841971693993751058209749445923078164062862089986280348253422571844827786301E1

BigDecimal b PI method : 0.314159265358979323846264338336544487694763327962E1

BigDecimal c PI method : 0.31415926535897932364198143965603E1```

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