CONTROL
- Introduction to CTRL
- CONTROL Classes
- Types of Control Functions
- CONTROL graphics
- CONTROL Functions
  - Funtions A
  - Funtions B
  - Funtions C
  - Funtions D
  - Functions E
  - Functions F
  - Functions G
  - Functions H
  - Functions I
  - Functions J
  - Functions K
  - Functions L
    - langEditor()
      Opens a language editor (langEditor)
    - LayerOff()
      Hides a layer.
    - LayerOffPanel()
      Hides a layer in a particular panel.
    - LayerOffPanelInModule()
      Hides a layer in a particular panel and module.
    - LayerOn()
      Displays a layer.
    - LayerOnPanel()
      Displays a layer in a particular panel.
    - LayerOnPanelInModule()
      Display a layer in a particular panel and particular module.
    - ldexp()
      Calculates x*2^n.
    - lineSelector()
      Opens the line type selector and writes a line type selected there to a variable.
    - log()
      Calculates the natural logarithm
    - log10()
      Calculates the decimal logarithm
    - LoginDialog()
      The function is used by LogoutDialog() to start the login dialog.
    - LogoutDialog()
      The function is used to open the logout dialog and to go to a new login dialog.
    - lookupSorted()
      Fast (binary) lookup in a sorted dyn_string.
  - Functions M
  - Functions N
  - Functions O
  - Functions P
  - Functions Q
  - Functions R
  - Functions S
  - Functions T
  - Functions U
  - Functions V
  - Functions W
  - Functions X
  - Functions Y
  - Functions Z
- CTRL Debugger
  With the CTRL Debugger you can debug the programming language Control.

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