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TypeScript | String substring() Method

  • Last Updated : 18 Jun, 2020

The substring() is an inbuilt function in TypeScript which is used to return the subset of a String object.

 Syntax: 

string.substring(indexA, [indexB]) 

Parameter: This method accepts two parameter as mentioned above and described elow: 

  • indexA : This parameter is the integer between 0 and one less than the length of the string.
  • indexB : This parameter is the integer between 0 and length of the string.

Return Value: This method returns the subset of a String object. 
Below example illustrate the String substring() method in TypeScript.

Example 1:  



JavaScript




<script>
    // Original strings
    var str = "Geeksforgeeks - Best Platform"
   
    // use of String substring() Method
    var newstr = str.substring(0,5) 
   
    console.log(newstr);
</script>

Output: 

Geeks

Example 2: 

JavaScript




<script>
    // Original strings
    var str = "Geeksforgeeks - Best Platform"
   
    // use of String substring() Method
    var newstr = str.substring(0,5) 
    console.log(newstr);
   
    newstr = str.substring(-2,5) 
    console.log(newstr);
   
    newstr = str.substring(12,22) 
    console.log(newstr);
   
    newstr = str.substring(0,1) 
    console.log(newstr);
</script>

Output: 

Geeks
Geeks
s - Best P
G



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