String Function - indexOf
how to find the position of a character or word in a string using javascript?
Explanation
Object: String
Method or Function: indexOf(string)
Description: This method takes a character or string as an argument. Searches the given string in the main string and returns the index or starting (first occurrence) position of the string. Returns -1 if the search string is not present in the main string.
<script language=javascript>
var ss = "a string index of test ";
var result = ss.indexOf("ri");
document.write(result);
</script>
Explanation:
In the above example,
Method or Function: indexOf(string)
Description: This method takes a character or string as an argument. Searches the given string in the main string and returns the index or starting (first occurrence) position of the string. Returns -1 if the search string is not present in the main string.
Example:
<script language=javascript>
var ss = "a string index of test ";
var result = ss.indexOf("ri");
document.write(result);
</script>
Result:
Explanation:
In the above example,
- the main string is stored in a variable ss.
- the method takes a string "ri" as argument.
- this function searches in main string (ss) for the search string (ri).
- the first occurrence of the search word is found at the position 4 and is returned as the result.
