# Ruby | BigDecimal sub() function

BigDecimal#sub() : sub() is a BigDecimal class method which returns the subtraction using a specified value.

Syntax: BigDecimal.sub()

Parameter: BigDecimal values

Return: the subtraction using a specified value.

Example #1 :

 `# Ruby code for BigDecimal.sub() method ` ` `  `# loading library ` `require ``'bigdecimal'` ` `  `# declaring bigdecimal ` `a = BigDecimal(``"10"``) ` ` `  `# declaring bigdecimal ` `b = -BigDecimal(``"10"``) ` ` `  `# declaring bigdecimal ` `c = -BigDecimal(``"11.43"``) ` ` `  `# sub() method ` `puts ``"BigDecimal a sub method : #{a.sub(b, 2)}\n\n"` ` `  `puts ``"BigDecimal b sub method : #{b.sub(c, 1)}\n\n"` ` `  `puts ``"BigDecimal c sub method : #{c.sub(a, 4)}\n\n"`

Output :

```BigDecimal a sub method : 0.2E2

BigDecimal b sub method : 0.1E1

BigDecimal c sub method : -0.2143E2

```

Example #2 :

 `# Ruby code for BigDecimal.sub() 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'``) ` ` `  `# sub() method ` `puts ``"BigDecimal a sub method : #{a.sub(b, 2)}\n\n"` ` `  `puts ``"BigDecimal b sub method : #{b.sub(c, 1)}\n\n"` ` `  `puts ``"BigDecimal c sub method : #{c.sub(a, 4)}\n\n"`

Output :

```BigDecimal a sub method : 0.21E96

BigDecimal b sub method : -0.2E96

BigDecimal c sub method : -0.147E3

```

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