# Python | Decimal log10() method

Decimal#log10() : log10() is a Decimal class method which returns the base ten logarithm of the Decimal value.

Syntax: Decimal.log10()

Parameter: Decimal values

Return: the base ten logarithm of the Decimal value.

Code #1 : Example for log10() method

 `# Python Program explaining  ` `# log10() 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.log10() method ` `print` `(``"\n\nDecimal a with log10() method : "``, a.log10()) ` ` `  `print` `(``"Decimal b with log10() method : "``, b.log10()) `

Output :

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

Decimal a with log10() method :  -0.002963289117473302730973454338
Decimal b with log10() method :  -0.8450984743089558813497604715

```

Code #2 : Example for log10() method

 `# Python Program explaining  ` `# log10() 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.log10() method ` `print` `(``"\n\nDecimal a with log10() method : "``, a.log10()) ` ` `  `print` `(``"Decimal b with log10() method : "``, b.log10()) `

Output :

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

Decimal a with log10() method :  0.4969296480732149319752200246
Decimal b with log10() method :  7.506505032404872078129569143
```

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