Search a string for "welcome":
The result of n will be:
More "Try it Yourself" examples below.
The indexOf() method returns the position of the first occurrence of a specified value in a string.
This method returns -1 if the value to search for never occurs.
Note: The indexOf() method is case sensitive.
Tip: Also look at the lastIndexOf() method.
Method | |||||
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indexOf() | Yes | Yes | Yes | Yes | Yes |
Parameter | Description |
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searchvalue | Required. The string to search for |
start | Optional. Default 0. At which position to start the search |
Return Value: | A Number, representing the position where the specified searchvalue occurs for the first time, or -1 if it never occurs |
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JavaScript Version: | 1.0 |
Find the first occurrence of the letter "e" in a string:
The result of n will be:
Find the first occurrence of the letter "e" in a string, starting the search at position 5:
The result of n will be: