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Python | Decimal logb() method
• Last Updated : 05 Sep, 2019

Decimal#logb() : logb() is a Decimal class method which returns the adjusted exponent of the Decimal value.

```Syntax:
Decimal.logb()

Parameter:
Decimal values

Return:
the adjusted exponent of the Decimal value.

```

Code #1 : Example for logb() method

 `# Python Program explaining  ` `# logb() method ` ` `  `# loading decimal library ` `from` `decimal ``import` `*` ` `  ` `  `# Initializing a decimal value ` `a ``=` `Decimal(``'.9932'``) ` ` `  `b ``=` `Decimal(``'0.142857'``) ` ` `  `# printing Decimal values ` `print` `(``"Decimal value a : "``, a) ` `print` `(``"Decimal value b : "``, b) ` ` `  ` `  `# Using Decimal.logb() method ` `print` `(``"\n\nDecimal a with logb() method : "``, a.logb()) ` ` `  `print` `(``"Decimal b with logb() method : "``, b.logb()) `

Output :

```Decimal value a :  0.9932
Decimal value b :  0.142857

Decimal a with logb() method :  -1
Decimal b with logb() method :  -1

```

Code #2 : Example for logb() method

 `# Python Program explaining  ` `# logb() method ` ` `  `# loading decimal library ` `from` `decimal ``import` `*` ` `  ` `  `# Initializing a decimal value ` `a ``=` `Decimal(``'3.14'``) ` ` `  `b ``=` `Decimal(``'321e + 5'``) ` ` `  `# printing Decimal values ` `print` `(``"Decimal value a : "``, a) ` `print` `(``"Decimal value b : "``, b) ` ` `  ` `  `# Using Decimal.logb() method ` `print` `(``"\n\nDecimal a with logb() method : "``, a.logb()) ` ` `  `print` `(``"Decimal b with logb() method : "``, b.logb()) `

Output :

```Decimal value a :  3.14
Decimal value b :  3.21E+7

Decimal a with logb() method :  0
Decimal b with logb() method :  7
```

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