# Documentation/Calc Functions/LOG10

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LOG10

Matematisk

## Resume:

Returnerer base 10-logaritmen af et tal.

## Syntaks:

LOG10(Number)

## Returnerer:

Returnerer et reelt tal, som er 10-talslogaritmen af tallet.

## Argumenter:

Tallet er den positive, reelle værdi eller en reference til en celle, der indeholder det tal, hvis 10-talslogaritme skal beregnes.

• Hvis tallet er negativt eller 0, så returnerer funktionen en fejlværdi.
• If Number is less than or equal to 0, then LOG10 reports an invalid argument error (Fejl:502).

## Yderligere oplysninger:

• For any positive real number x, $\displaystyle{ 10^{\text{log}(x)}=x }$ and $\displaystyle{ \text{log}(10^x)=x }$.
• To convert the common logarithm of a positive real number x to a natural logarithm (base-e), use the formula $\displaystyle{ \text{ln}(x)=\text{log}(x)~/~\text{log}(e) }$.
• Additional information about common logarithms can be found at Wikipedia's Common logarithm page.
• GIFen herunder illustrerer funktionen LOG10:
LOG10 function
LOG10 function

## Eksempler:

Formula Description Returns
=LOG10(3,5) Here the function returns the common logarithm of 3.5. 0,544068044350276
=LOG10(0,5) Here the function returns the common logarithm of 0.5. −0,301029995663981
=LOG10(D1) where cell D1 contains the value 1. Here the function returns the common logarithm of 1. 0
=LOG10(POTENS(10; 1)) Here the function returns the common logarithm of 10. 1
=LOG10(POTENS(10; 34)) Here the function returns the common logarithm of 10 raised to the power of 34, which is 34. 34
=POTENS(10; LOG10(789)) Here the function returns 10 to the power of the common logarithm of 789, which is 789. 789

LOG10