What is the action of strcat() function?*1 pointcompare two stringsconcatenate two stringsfind the length of the stringcopies one string to another

Action of strcat() Function

The strcat() function is used in the C programming language and it specifically serves to concatenate two strings. Here's a brief explanation of each option provided in the question:

1. Compare two strings: This is performed by the strcmp() function, not strcat().
2. Concatenate two strings: This is the correct action of the strcat() function, which appends the content of the second string to the end of the first string.
3. Find the length of the string: The strlen() function is used to determine the length of a string, not strcat().
4. Copies one string to another: The strcpy() function is used for copying strings, not strcat().

Final Answer

The correct answer is "concatenate two strings."