# Ruby | BigDecimal exp() function

BigDecimal#exp() : exp() is a BigDecimal class method which returns the value of e (the base of natural logarithms) raised to the power of decimal, to the specified number of digits of precision.

Syntax: BigDecimal.exp()

Parameter: BigDecimal values

Return: the value of e (the base of natural logarithms) raised to the power of decimal

Example #1 :

 `# Ruby code for BigDecimal.exp() method ` ` `  `# loading library ` `require ``'bigdecimal'` ` `  `# declaring bigdecimal ` `a = BigDecimal(``"10"``) ` ` `  `# declaring bigdecimal ` `b = BigDecimal(``"1000"``) *``2` ` `  `# declaring bigdecimal ` `c = BigDecimal(``"11.43"``) ` ` `  `# exp() method ` `puts ``"BigDecimal a exp method : #{Math.exp(a)}\n\n"` ` `  `puts ``"BigDecimal b exp method : #{Math.exp(b)}\n\n"` ` `  `puts ``"BigDecimal a exp method : #{Math.exp(c)}\n\n"`

Output :

```BigDecimal a exp method : 22026.465794806718

BigDecimal b exp method : Infinity

BigDecimal a exp method : 92041.97481768382

```

Example #2 :

 `# Ruby code for BigDecimal.exp() method ` ` `  `# loading library ` `require ``'bigdecimal'` ` `  `# declaring bigdecimal ` `a = BigDecimal(``'12'``)*``12` ` `  `# declaring bigdecimal ` `b = BigDecimal(``'10'``)+(``22` `** ``7``.``1``) ** ``10` ` `  `# declaring bigdecimal ` `c = -BigDecimal(``'-3'``) ` ` `  `# exp() method ` `puts ``"BigDecimal a exp method : #{Math.exp(a)}\n\n"` ` `  `puts ``"BigDecimal b exp method : #{Math.exp(b)}\n\n"` ` `  `puts ``"BigDecimal a exp method : #{Math.exp(c)}\n\n"`

Output :

```BigDecimal a exp method : 3.454660656717546e+62

BigDecimal b exp method : Infinity

BigDecimal a exp method : 20.085536923187668

```

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