printf

printf statements generally look like this:

printf("This is a variable with a value of %f that will be printed", someVariable);

the value of someVariable will be inserted into the string where the format specifier is (%f in this case). you use %f for floats, %d for ints, %c for chars, and there is a lot more as well.

you are almost correct. use double quotes around your string, and instead of using 14.5 use a format specifier. also your \n escape sequence is missing the n. you also forgot to close your string. fixing all that leads to this:

float radius = 14.5;
printf("A ball with a radius of %f inches.\n", radius);

since the variable you want to print is a float, you use %f as the format specifier

float radius = 14.5; printf('A ball with a radius of 14.5 inches.\, radius);