log10()

Calculates the decimal logarithm

Synopsis

float log10(float x);

Parameters

Parameter Description
x value greater than 0

Return value

In the event of an error, the function returns 0.0.

If the argument is lying outside of the value range ]0..], NaN (Not a Number) is returned.

Description

Returns the decimal logarithm (base 10) of x, for x > 0.

Example

main()
{
  float f;
  f=log(1); // returns 0
  f=log10(100); // returns 2
}

Assignment

mathematical function

Availability

CTRL