Which function can be used to replace text in a string?

The function that can be used to replace text in a string is TRANWRD(). This function allows you to specify a target substring that you want to replace and the replacement substring to use. When you call TRANWRD(), you provide it with three arguments: the source string, the substring you want to find, and the substring you want to replace it with. This makes it an effective tool for modifying string content within a SAS program.

For instance, if you have a string "The sky is blue" and you want to replace "blue" with "clear," you would use TRANWRD() to achieve this. The function processes the entire string and replaces all occurrences of the specified substring accordingly, resulting in the new string "The sky is clear."

The other functions listed serve different purposes: TRIM() is used to remove trailing blanks from a string, INDEX() finds the position of a substring within a string, and PROPCASE() converts the first character of each word in a string to uppercase, making them unsuitable for the task of replacing text.