4 Questions
Write a JS loop that will display every other element in an array, arr For example, if arr=[6,1,5,7,2,4,4,8,0,6,9,1] your code should display 6 5 2 4 0 9 Use document.write to display your results. The numbers should be separated by spaces
What does the array arr contain after the following JavaScript code is executed? var arr = new Array(10,1,3,2,4); for (var i = 1; i < arr.length; i = i + 1) { arr[i] = arr[i -1] + 1; }
Consider the following JavaScript code. Complete that one assignment statement above so that the value of taxAmount is computed as 7% of the function parameter cost
Write a JS function, sumOfHalf, the will return the sum of the first half of the elements in its array parameter. Assume the array has at least 2 elements.
Study Notes
JavaScript Loops and Arrays
- Create a JavaScript loop to display every other element in an array
arr, usingdocument.writeto display the results, with numbers separated by spaces.
Array Modification
- The array
arrcontains[10, 2, 4, 5, 6]after the codevar arr = new Array(10,1,3,2,4); for (var i = 1; i < arr.length; i = i + 1) { arr[i] = arr[i -1] + 1; }is executed.
Tax Amount Calculation
- Complete the assignment statement to compute the value of
taxAmountas 7% of the function parametercost, like this:taxAmount = cost * 0.07;
Sum of First Half
- Write a JavaScript function
sumOfHalfthat returns the sum of the first half of the elements in its array parameter, assuming the array has at least 2 elements. - The function would take an array as input, calculate the middle index, and then sum up the elements from the start to the middle index.
Learn how to write a JavaScript loop that displays every other element in an array using document.write. For the given array arr=[6,1,5,7,2,4,4,8,0,6,9,1], the code should display 6 5 2 4 0 9 with numbers separated by spaces.
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