How to write exponent in racket?

Question

Using (x^4) or (^ x 4) giving an error message. Is there some functions for exponent than simply using (* x x x x)?

Answer 1

Use the primitive function expt (see reference):

(expt x 4)    ;  = x⁴

Answer 2

If you forget expt, you can use:

(for/product ((i 4))  x)

It's easier than writing (* x x x x) for larger values.