In mathematics, the nth harmonic number is defined to be 1 1/2 1/3 1/4 1/n. so, the first harmonic number is 1, the second is 1.5, the third is 1. and so on. assume that n is an integer variable whose value is some integer n greater than 1. assume also that hn is a double variable whose value is the nth harmonic number. write an expression whose value is the (n-1)th harmonic number.