What will be the output of printf("%d %d\n", 5, 6);?

The code printf("%d %d\n", 5, 6); calls the printf function to print two integers. The format specifier %d is used to indicate that integers are being printed. In this specific case, the function will output the first argument, which is 5, followed by a space, and then the second argument, which is 6.

The output will therefore be "5 6", followed by a newline due to the \n at the end of the format string. Understanding how format specifiers work is crucial when using printf, as they dictate how the arguments are interpreted and displayed.

The other responses could suggest different placements or formats for the numbers, or imply a syntax issue, but none accurately reflect the functioning of the printf statement in this context.