log10() – Mathematical Function

log10() – Mathematical Function

How is Mathematical Function “log10()” used in C++?
How to find the base 10 Logarithm of a number?


log10() is a Mathematical Function that returns the base 10 logarithm for the given “num”. This function triggers a domain error when the “num” is negative and a range error occurs if the “num” is zero.

Syntax to find the Logarithm:

float log10( float num );
double log10( double num );
long double log10( long double num );

Example :

int main()
cout << "Log10 of 100 is:: " << log10(100) << endl;
cout << "Log10 of 1000 is:: " << log10(1000) << endl;
return 0;

Result :

Log10 of 100 is:: 2
Log10 of 1000 is:: 3

In the above example log10() is used to find the base 10 logarithm for a “num”.

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