logo CodeStepByStep logo


Language/Type: PHP recursion

Write a recursive function named sum_up_to that accepts an integer parameter $n and returns the sum of 1 + 1/2 + 1/3 + 1/4 + ... + 1/$n.

For example, the call of sum_up_to(2) should return 1.5 (from 1 + 1/2 = 1.5). You should return 0.0 if $n is 0, and you should throw an Exception if $n is less than 0.

Function: Write a PHP function as described, not a complete program.

You must log in before you can solve this problem.

Log In

Need help?

Stuck on an exercise? Contact your TA or instructor.

If something seems wrong with our site, please

Is there a problem? Contact us.