Here 10 simple javascript For-Loop Exercises to test your introductory-level understanding of Javascript For-Loops. Use for-loops in all of your solutions below. <\/p>\n\n\n\n
Get the sum of two arrays\u2026actually the sum of all their elements.
P.S. Each array includes only integer numbers. Output is a number too.<\/p>\n\n\n\n
let arr_1 = [3, 5, 22, 5, 7, 2, 45, 75, 89, 21, 2]; \/\/ --> 276\nlet arr_2 = [9, 2, 42, 55, 71, 22, 4, 5, 90, 25, 26]; \/\/ --> 351\n\/\/ Example output: \n\/\/ 276 + 351 = 627<\/code><\/pre>\n\n\n\nExercise 2)<\/h2>\n\n\n\n
Using a for loop print all even numbers up to and including n. Don\u2019t include 0.<\/p>\n\n\n\n
let n1 = 22; \n\/\/ Example output: \n\/\/ 2 4 6 8 10 12 14 16 18 20 22 OR each item on a new line\n <\/code><\/pre>\n\n\n\nExercise 3)<\/h2>\n\n\n\n
Using a for loop output the elements in reverse order <\/p>\n\n\n\n
let arr = [43, \"what\", 9, true, \"cannot\", false, \"be\", 3, true];\n\/\/ Example output: \n\/\/ true 3.5 be false cannot true 9 what 43 OR each item on a new line<\/code><\/pre>\n\n\n\nExercise 4)<\/h2>\n\n\n\n
Given two arrays of integers. Add up each element in the same position and
create a new array containing the sum of each pair. Assume both arrays are of the same length.<\/p>\n\n\n\n
\nlet arr_3 = [4, 6, 7];\nlet arr_4 = [8, 1, 9];\n\/\/ Example output: \n\/\/ [12, 7, 16]<\/code><\/pre>\n\n\n\nExercise 5)<\/h2>\n\n\n\n
Given a string change the every second letter to an uppercase \u2018Z\u2019. Assume
there are no space. <\/p>\n\n\n\n
let str1 = \"javascript\"; \n\/\/ Example output: \n\/\/ jZvZsZrZpZ OR each letter on a new line\n\/\/ HINT: You can use if((i+1) % 2 == 0) to check for even indexes <\/code><\/pre>\n\n\n\nExercise 6)<\/h2>\n\n\n\n
Check if a string contains the letter \u201cy\u201d. Print \u201cyes\u201d if it does and \u201cno\u201d if it does not.<\/p>\n\n\n\n
let str2 = \"don\u2019t know why\";\n\/\/ Example output: \n\/\/ \u201cyes\u201d <\/code><\/pre>\n\n\n\nExercise 7)<\/h2>\n\n\n\n
Given a number n Calculate the factorial of the number <\/p>\n\n\n\n
let n2 = 4; \/\/ 4 * 3 * 2 * 1 = 24\n\/\/ Example output:\n\/\/ 24<\/code><\/pre>\n\n\n\nExercise 8)<\/h2>\n\n\n\n
Write a program that will allow someone to guess a four digit pin exactly 4
times. If the user guesses the number correctly. It prints \u201cThat was
correct!\u201d Otherwise it will print \u201cSorry that was wrong.\u201d Program stops after the 4th attempt of if they got it right. <\/p>\n\n\n\n
let pin = 0704;\n\/\/ Example output:\n\/\/ Please make your guess: \n\/\/ 4544 \n\/\/ Sorry that was wrong.\n\/\/ Please make your guess: \n\/\/ 4444\n\/\/ Sorry that was wrong.\n\/\/ Please make your guess: \n\/\/ 0704\n\/\/ That was correct!<\/code><\/pre>\n\n\n\nExercise 9)<\/h2>\n\n\n\n
Write a program that will check if two strings are palindromes. A palindrome is a word that spells the same forward and backward.
Palindrome: a word, phrase, or sequence that reads the same backward as
forward, e.g., madam or nurses run.<\/p>\n\n\n\n
let str3 = \"racecar\";\nlet str4 = \"Java\";\n\/\/ Example output:\n\/\/ string1 palindrome?: \n\/\/ Yes \n\/\/ string2 palindrome?: \n\/\/ No <\/code><\/pre>\n\n\n\nExercise 10)<\/h2>\n\n\n\n
This is a code wars kata. click here to train on \u201cGrasshopper \u2013 Summation\u201d on
code wars. Write a program that finds the summation of every number from 1 to num. The number will always be a positive integer greater than 0.<\/p>\n\n\n\n
let num1 = 2; \nlet num2 = 8; \n\/\/ Example output: \n\/\/ 1 + 2 = 3\n\/\/ 1 + 2 + 3 + 4 + 5 + 6 + 7 + 8 = 36 <\/code><\/pre>\n\n\n\nEMBEDDED COMPILER<\/strong><\/h2>\n\n\n\n