When a selected key is pressed in Unity, the Input Manager's Input.GetAxis("Horizontal") function returns a gradually increasing number up to 1 (or negatively -1) for the length it is held down. The rate at which it increases is based on the value Sensitivity in the Input Manager. Similarly, the sticks on a controller return a value depending on how far they are tilted.

Is there a proper way to make the value immediately snap to -1 or 1 through the manager, or would I have to write a couple of if statements in my script to handle that?\

Edit: A very short and readable scripting option would be if (Mathf.Abs(isRunning) > 0) isRunning = Mathf.Sign(isRunning);

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    \$\begingroup\$ Something wrong with if(value < 0) {...} else if (value > 0){...}? \$\endgroup\$
    – House
    Jun 1, 2015 at 5:28
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    \$\begingroup\$ You could just cast the return value to an int. Thus you'll get -1 or 1 once the appropriate button is pressed. For more precision you could take a look at Math.Round. \$\endgroup\$
    – Kagemusha
    Jun 1, 2015 at 5:29
  • \$\begingroup\$ This is more for curiosity, it seems crazy that this option isn't available in the manager \$\endgroup\$ Jun 1, 2015 at 6:13
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    \$\begingroup\$ If you're using a keyboard, What's wrong with Input.GetAxisRaw("Horizontal");? docs.unity3d.com/ScriptReference/Input.GetAxisRaw.html \$\endgroup\$
    – Savlon
    Jun 2, 2015 at 13:10
  • \$\begingroup\$ Yes, that's what I'm looking for @Savlon. I think that should be the accepted answer if you would convert it to one. \$\endgroup\$ Jun 3, 2015 at 16:06

2 Answers 2


Reference: http://docs.unity3d.com/ScriptReference/Input.GetAxisRaw.html

If you are wanting the value to be -1, 0 or 1, use GetAxisRaw for keyboard inputs.


I think you would need to do it the if statement way.

For instance...

For the value to be either 1 or -1:

int amount = Input.GetAxis("Horizontal") > 0 ? 1 : -1;

For the value to be 1, 0, or -1:

float f;
int amount = (f=Input.GetAxis("Horizontal")) > 0 ? 1 : f < 0 ? -1 : 0;
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    \$\begingroup\$ The first statement is a bad idea since it's never zero. Zero indicates no key is pressed. The second statement is overly complicated as a one-liner, and would be easier to break out into multiple statements (in my opinion). \$\endgroup\$
    – House
    Jun 1, 2015 at 5:40
  • \$\begingroup\$ Good points, I don't disagree. \$\endgroup\$ Jun 1, 2015 at 5:43
  • \$\begingroup\$ That's too bad, I'm really disappointed there isn't such a trivial setting available \$\endgroup\$ Jun 1, 2015 at 6:12

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