The FIND function in SAS searches for a substring (here 'US') within a string (here 'Australia, US, Denmark') starting from a specified position. In this code, the position is set to 5, which starts searching from the character position 5 within the 'Text' string. However, positions in SAS strings start at the first character being position 1. So, the search starts from the character 'r' of 'Australia'. Since 'US' does not appear after position 5 within the given text 'Australia, US, Denmark', the FIND function returns 0, indicating the substring was not found within the specified constraints.