# How do you do a two step? – Shakira Belly Dancing Techniques Salon East

Well here’s what happens at the second step. Step number two is exactly the same as it is at the first step, except that the step itself does not use the index. The index is only used when the loop body of the predicate reaches the end. However, when the predicate reaches the end, the index will normally be used. If the index was used and it became empty, then you have to use the full predicate in the function instead of just the index. For example, suppose I want to find the minimum of a set of numbers. The following functions are the equivalent. For each number, I can do either the sum or the difference and add up the values:

function sum(num) { if (num > 0) return num – 1; else return num + 1; } function difference(num) { if (num < 0) return num - 1; else return num + 1; } function multiply(num, num1, num2) { if (num1 < num2) num1 = num2; num2 = num1 - num2; return num1 * num2; }; The following function calculates the number of times a number is raised by calling another function with the number as argument or by using the index. function multiply(num, num1, num2) { return num1 / num2; }

The following function takes the number of numbers from the set and returns the total value of the set. It is defined on line 5.

function sum(n) { if (!n) return -n; if (0 < n || n % 10 == 0) return n; var num = 0; return -n + num; }; The following function returns the sum of a sequence of numbers. function sum(arr1, arr2) { return arr1 + arr2; };
The following functions give the product of two numbers.

function product(n1, n2) { if ((n1 < n2) || (-n1 < n3) || (-n2 < n4) || (n1 > n3)) return -n1; if (0 < n1 || n1 > n3) n1 = n3; if (0 < n1 || n1 < n4) n1 = 0; if (0 < n1 || n2 > 0) n1 = 2 * n1; if (n1 > 0) n2 = 2

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