How can I get last characters of a string

Question

I have   var id  ctl03 Tabs1     Using JavaScript  how might I get the last five characters or last character

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Last 5  x000D   x000D  var id  ctl03 Tabs1   x000D  var res   id charAt id length-5  x000D  alert res   x000D   x000D   x000D    Last  x000D   x000D      x000D   var id  ctl03 Tabs1   x000D   var res   id charAt id length-1  x000D  alert res   x000D   x000D   x000D

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Check out the substring function   To get the last character   id substring id length - 1  id length

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var id  ctl03 Tabs1   var res   id charAt id length-1     I found this question and through some research I found this to be the easiest way to get the last character   As others have mentioned and added for completeness to get the last 5   var last5   id substr -5

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You can use the substr   method with a negative starting position to retrieve the last n characters  For example  this gets the last 5   var lastFiveChars   id substr -5

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Performance Today 2020 12 31 I perform tests on MacOs HighSierra 10 13 6 on Chrome v87  Safari v13 1 2 and Firefox v84 for chosen solutions for getting last N characters case  last letter case result  for clarity I present in separate answer   Results For all browsers  solution D based on slice is fast or fastest solution G is slowest   Details I perform 2 tests cases   when string has 10 chars - you can run it HERE when string has 1M chars - you can run it HERE  Below snippet presents  solutions A B C D E F G  my   x000D   x000D    https   stackoverflow com questions 5873810 how-can-i-get-last-characters-of-a-string     https   stackoverflow com a 30916653 860099 function A s n      return s substr -n        https   stackoverflow com a 5873890 860099 function B s n      return s substr s length - n        https   stackoverflow com a 17489443 860099 function C s n      return s substring s length - n  s length         https   stackoverflow com a 50395190 860099 function D s n      return s slice -n         https   stackoverflow com a 50374396 860099 function E s n      let i   s length-n    let r         while i lt s length  r    s charAt i       return r       https   stackoverflow com a 17489443 860099 function F s n      let i   s length-n    let r         while i lt s length  r    s i       return r       my function G s n      return s match new RegExp      n               --------------------    TEST    --------------------   A B C D E F G  map f  gt        console log      f name         f  ctl03 Tabs1  5        x000D  This shippet only presents functions used in performance tests - it not perform tests itself  x000D   x000D   x000D   And here are example results for chrome

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I actually have the following problem and this how i solved it by the help of above answer but different approach in extracting id form a an input element   I have attached input filed with an   id  rating element- lt  php echo  id  gt     And   when that button clicked i want to extract the id which is the number  or the php ID   id  only   So here what i do         rating   on  rating change   function                 alert   this  val                   console log this id              var static id text   rating element-   length                    var product id    this id slice static id text           get the length in order to deduct from the whole string               console log product id     outputs the last id appended

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One way would be using slice  like follow   var id  ctl03 Tabs1   var temp id slice -5     so the value of temp would be  Tabs1

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Performance Today 2020 12 31 I perform tests on MacOs HighSierra 10 13 6 on Chrome v87  Safari v13 1 2 and Firefox v84 for chosen solutions for getting last character case  last N letters case results  for clarity I present in separate answer   Results For all browsers  solutions D E F are quite-fast or fastest solutions G H are slowest   Details I perform 2 tests cases   when string has 10 chars - you can run it HERE when string has 1M chars - you can run it HERE  Below snippet presents  solutions A B C D E F G  my   H  my   x000D   x000D    https   stackoverflow com questions 5873810 how-can-i-get-last-characters-of-a-string     https   stackoverflow com a 30916653 860099 function A s      return s substr -1        https   stackoverflow com a 5873890 860099 function B s      return s substr s length - 1        https   stackoverflow com a 17489443 860099 function C s      return s substring s length - 1  s length         https   stackoverflow com a 50395190 860099 function D s      return s slice -1         https   stackoverflow com a 50374396 860099 function E s        return s charAt s length-1         https   stackoverflow com a 17489443 860099 function F s        return s s length-1         my function G s      return s match              my function H s      return     s  pop          --------------------    TEST    --------------------   A B C D E F G H  map f  gt        console log      f name         f  ctl03 Tabs1         x000D  This shippet only presents functions used in performance tests - it not perform tests itself  x000D   x000D   x000D   And here are example results for chrome

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If you just want the last character or any character at know position you can simply trat string as an array  - strings are iteratorable in javascript -  Var x    hello world    x 0                        h  x x length-1       d   Yet if you need more than just one character then use splice is effective  x slice -5          world   Regarding your example   rating element- lt  php echo  id  gt     To extract id you can easily use split   pop  Id  inputId split  rating element-   1     This will return the id  or undefined if no id was after  rating element

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Assuming you will compare the substring against the end of another string and use the result as a boolean you may extend the String class to accomplish this   String prototype endsWith   function  substring      if substring length  gt  this length  return false    return this substr this length - substring length      substring       Allowing you to do the following   var aSentenceToPonder    This sentence ends with toad    var frogString    frog   var toadString    toad   aSentenceToPonder endsWith frogString     false aSentenceToPonder endsWith toadString     true

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Following script shows the result for get last 5 characters and last 1 character in a string  using JavaScript  var testword  ctl03 Tabs1   var last5 testword substr -5     Get 5 characters var last1 testword substr -1     Get 1 character  Output    Tabs1    Got 5 characters 1    Got 1 character

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This one will remove the comma if it is the last character in the string    var str       ControlId   val     if str substring str length-1             var stringWithoutLastComma   str substring 0 str length-1

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EDIT  As others have pointed out  use slice -5  instead of substr  However  see the  split   pop   solution at the bottom of this answer for another approach   Original answer   You ll want to use the Javascript string method  substr   combined with the  length property   var id    ctl03 Tabs1   var lastFive   id substr id length - 5        gt   Tabs1  var lastChar   id substr id length - 1        gt   1    This gets the characters starting at id length - 5 and  since the second argument for  substr   is omitted  continues to the end of the string   You can also use the  slice   method as others have pointed out below   If you re simply looking to find the characters after the underscore  you could use this   var tabId   id split      pop         gt   Tabs1    This splits the string into an array on the underscore and then  pops  the last element off the array  which is the string you want

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Don t use  substr    Use the  slice   method instead because it is cross browser compatible  see IE     x000D   x000D  const id    ctl03 Tabs1   x000D  console log id slice id length - 5      Outputs  Tabs1 x000D  console log id slice id length - 1      Outputs  1 x000D   x000D   x000D    substr   with negative value not working in IE

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Getting the last character is easy  as you can treat strings as an array   var lastChar   id id length - 1     To get a section of a string  you can use the substr function or the substring function   id substr id length - 1     get the last character id substr 2                 get the characters from the 3rd character on id substr 2  1              get the 3rd character id substr 2  2              get the 3rd and 4th characters   The difference between substr and substring is how the second  optional  parameter is treated  In substr  it s the amount of characters from the index  the first parameter   In substring  it s the index of where the character slicing should end

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I am sure this will work      var string1  myfile pdf  var esxtenion string1 substr string1 length-4    The value of extension will be   pdf

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To get the last character of a string  you can use the split     pop   function  const myText    quot The last character is J quot   const lastCharater   myText split     pop    console log lastCharater      J  It s works because when the split     function has empty     as parameter  then each character of the string is changed to an element of an array  Thereby we can use the pop   function which returns the last element of that array  which is  the  J  character

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Here 2 examples that will show you always the last character  x000D   x000D  var id  ctl03 Tabs1    console log id charAt id length - 1      console log id id length - 1     x000D   x000D   x000D

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The Substr function allows you to use a minus to get the last character   var string    hello   var last   string substr -1     It s very flexible  For example      Get 2 characters  1 character from end    The first part says how many characters    to go back and the second says how many    to go forward  If you don t say how many    to go forward it will include everything var string    hello    var lasttwo   string substr -3 2         lo

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There is no need to use substr method to get a single char of a string   taking the example of Jamon Holmgren we can change substr method and simply specify the array position   var id    ctl03 Tabs1   var lastChar   id id length - 1        gt   1

[javascript] How can I get last characters of a string

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