suresh What is the difference between SAS functions SUBSTR and INDEX?
When comparing SAS functions SUBSTR and INDEX, it is important to note their distinct roles and functionalities.
INDEX Function:
The INDEX function in SAS is mainly used to find the position of a substring within a larger string. It returns the position of where the specified substring begins within the given string. If the substring is not found, the function returns 0.
SUBSTR Function:
On the other hand, the SUBSTR function in SAS is used to extract a specific portion of a string. It allows you to specify the starting position and the length of the substring that you want to extract from the original string.
Therefore, the key difference between the two functions is that INDEX is used to locate a substring within a string, while SUBSTR is used to extract a portion of a string based on specified criteria.
Both INDEX and SUBSTR functions play crucial roles in string manipulation and analysis in SAS programming.
For more information on SAS functions and their applications, consult the official SAS documentation or resources on SAS programming.
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