How to check if a number is between two values

Question

In JavaScript  I m telling the browser to do something if the window size is greater than 500px  I do it like so   if  windowsize  gt  500           do this     This works great  but I would like to apply this same method  but with a range of numbers  So I would like to tell my browser to do stuff if the window size is between 500px and 600px  I know this wouldn t work  but here is how I imagined it   if  windowsize  gt  500-600           do this     Is this even possible  within JavaScript

User · Answer

You can use Multiple clause in if condition instead of writing  if  windowsize  gt  500-600           do this     because this really makes no sense logically JavaScript will read your if condition like   windowSize  gt  -100    because it calculates 500-600 to -100  You should use  amp  amp  for strict checking both cases for example which will look like this   if  windowSize  gt  500  amp  amp  windowSize  lt  600        Then doo something

User · Answer

It s an old question  however might be useful for someone like me   lodash has   inRange   function https   lodash com docs 4 17 4 inRange  Example     inRange 3  2  4        gt  true   Please note that this method utilizes the Lodash utility library  and requires access to an installed version of Lodash

User · Answer

I had a moment  so  although you ve already accepted an answer  I thought I d contribute the following    x000D   x000D  Number prototype between   function a  b    x000D    var min   Math min apply Math   a  b    x000D      max   Math max apply Math   a  b    x000D    return this  gt  min  amp  amp  this  lt  max  x000D     x000D   x000D  var windowSize   550  x000D   x000D  console log windowSize between 500  600    x000D   x000D   x000D    JS Fiddle demo   Or  if you d prefer to have the option to check a number is in the defined range including the end-points    x000D   x000D  Number prototype between   function a  b  inclusive    x000D    var min   Math min apply Math   a  b    x000D      max   Math max apply Math   a  b    x000D    return inclusive   this  gt   min  amp  amp  this  lt   max   this  gt  min  amp  amp  this  lt  max  x000D     x000D   x000D  var windowSize   500  x000D   x000D  console log windowSize between 500  603  true    x000D   x000D   x000D    JS Fiddle demo   Edited to add a minor amendment to the above  given that  ndash  as noted in the comments  ndash       hellip Function prototype apply   is slow  Besides calling it when you have a fixed amount of arguments is pointless hellip    it was worth removing the use of Function prototype apply    which yields the amended versions of the above methods  firstly without the  inclusive  option    x000D   x000D  Number prototype between   function a  b    x000D    var min   Math min a  b   x000D      max   Math max a  b   x000D   x000D    return this  gt  min  amp  amp  this  lt  max  x000D     x000D   x000D  var windowSize   550  x000D   x000D  console log windowSize between 500  600    x000D   x000D   x000D    JS Fiddle demo   And with the  inclusive  option    x000D   x000D  Number prototype between   function a  b  inclusive    x000D    var min   Math min a  b   x000D      max   Math max a  b   x000D   x000D    return inclusive   this  gt   min  amp  amp  this  lt   max   this  gt  min  amp  amp  this  lt  max  x000D    x000D   x000D  var windowSize   500  x000D   x000D  console log windowSize between 500  603  true    x000D   x000D   x000D    JS Fiddle demo   References    Function prototype apply    Math max    Math min

User · Answer

Tests whether windowsize is greater than 500 and lesser than 600 meaning that neither values 500 or 600 itself will result in the condition becoming true   if  windowsize  gt  500  amp  amp  windowsize  lt  600

User · Answer

Here is the shortest method possible   if  Math abs v-550  lt 50  console log  short   if   v-500   v-600  lt 0  console log  short     Parametrized   if  Math abs v-max v-min  lt max min  console log  short   if   v-min   v-max  lt 0  console log  short     You can divide both sides by 2 if you don t understand how the first one works

User · Answer

I just implemented this bit of jQuery to show and hide bootstrap modal values  Different fields are displayed based on the value range of a users textbox entry     document  ready function          jQuery noConflict        var Ammount   document getElementById  Ammount             addtocart   click function                   if    Ammount  val    gt   250  amp  amp    Ammount  val    lt   499                                              myModal   modal                            myModalLabelbronze   show                            myModalLabelsilver   hide                            myModalLabelgold   hide                            myModalPbronze   show                            myModalPSilver   hide                            myModalPGold   hide

User · Answer

I prefer to put the variable on the inside to give an extra hint that the code is validating my variable is between a range values  if  500  lt  size  amp  amp  size  lt  600    doStuff

User · Answer

this is a generic method  you can use everywhere const isBetween    num1 num2 value    gt  value  gt  num1  amp  amp  value  lt  num2

[javascript] How to check if a number is between two values?

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