Learn to Code

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This is for new coders who are trying to improve their basic algorithm skills. It focuses on basic building blocks of computer programming such as variables, if/else statement, loops, and functions.

If you're new to coding, before you attempt this module, please check Coding Dojo's algorithm app (algorithm.codingdojo.com) and afterwards, try the challenges here. Once you're done with this module, you can then go to "Basic Algorithms” which has more challenging problems to solve.

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1

Print from 1 to 20

Create a function that prints/logs all the integers from 1 to 20. <figure><iframe style="width: 500px; height: 281px;" src="//player.vimeo.com/video/389911697" ></iframe></figure> <h2>New to ...
2

Print Odd from 3 to 20

Create a function that prints/logs all the odd numbers from 3 to 20. <figure><iframe style="width: 500px; height: 281px;" src="//player.vimeo.com/video/389909614" ></iframe></figure> <h2>New ...
3

Print Even from 4 to 22

Create a function that prints/logs all the even numbers from 4 to 22. <h2>New to coding?</h2> If you're completely new to coding, please first try <a target="_blank" href="https://algorith ...
4

Multiples of 7

Print/log all the multiples of 7 between the numbers 7 to 62.
5

Countdown by Fives

Log positive numbers starting at 50, counting down by fives (exclude 0).
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First Plus Length

Given an array, print/log the sum of the first value in the array, plus the array’s length. Assume that the array is composed of numbers
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Print Even from 4 to 22 - Part 2

Create a function that prints/logs all the even numbers from 4 to 22. Have it also return the sum of all the numbers that were printed.
8

Add odd integers from -25,000 to 30,000

Add odd integers from -25,000 to 30,000 and have the function return its final sum. Is there a short cut? Before you work on this, please watch the following video: <figure><ifr ...
9

Print the array

Given an array, write a function that prints/logs each number in the array.
10

Print Positives

Given an array, write a function that only prints/logs its positive value. For example printPositives([-1,3,-5, 10]) prints/logs 3, 10.
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Print Positive Indexes

Given an array, write a function that prints the index value of its positive values. For example printPositiveIndex([1, 3, -10]), have it print/log 0, 1 (as the 0th index had a positive v ...
12

Be Positive

Given an array, write a function that returns a new array where each negative value was converted to a positive value. For example, bePositive([-1,-3,-5]) returns [1, 3, 5]. A positive number in ...
13

Squares

Given an array with multiple values, write a function that replaces each value in the array with the product of the original value multiplied by itself. For example squareVal( [1, 3, 5] ) should r ...
14

No Negatives

Given an array with multiple values, write a function that replaces any negative numbers within the array with the value of 0. When the program is done the array should contain no negative values. ...
15

Sum of Array

Given an array of multiple values, write a function that returns the sum of its numbers. For example, findSum([1,2,3]) should return 6.
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Find max

Given an array with multiple values, write a function that returns the maximum number in the array. For example, findMax([-3,3,5,7]) should return 7.
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Find min

Given an array with multiple values, write a function that returns the minimum value in the array. For example findMin([0,3,-5]) should return -5.
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Find min and max

Given an array with multiple values, write a function that returns a new array with two elements. The first value in the new array should be the minimum value in the original array. The second va ...
19

Count Positives

Given array of numbers, create function to replace last value with number of positive values. Example, countPositives([-1,1,1,1]) changes array to [-1,1,1,3] and returns it.
20

Values Greater than Second

Given an array, write a function that prints values that are greater than its 2nd value in the array. For example, given [1,3,5,7,9,13], it should print/log 5, 7, 9, and 13. Assume that the arra ...
21

This Length, That Value

Given two numbers passed to the function, return a new array of length num1 with each value num2. For example, thisLengthThatValue(3,5) should return [5, 5, 5]. thisLengthThatValue(2, 10) should ...
22

Add Seven to Most

Build function that accepts array. Return a new array with all values except first, adding 7 to each. Do not alter the original array. For example, addSevenToMost([1,3,5]) should return [10 ...
23

Values Greater than Second, Generalized

Write a function that accepts any array, and returns a new array with the array values that are greater than its 2nd value. If the array that was passed to the function has less than two elements, ...
24

Swap Values

Write a function that will swap the first and last values in any given array. The default minimum length of the array is 2. For example swapFirstLast([1,3,5]) should return [5, 3, 1]. swapFirstL ...
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Print from 1 to 20

Print Odd from 3 to 20

Print Even from 4 to 22

Multiples of 7

Countdown by Fives

First Plus Length

Print Even from 4 to 22 - Part 2

Add odd integers from -25,000 to 30,000

Print the array

Print Positives

Print Positive Indexes

Be Positive

Squares

No Negatives

Sum of Array

Find max

Find min

Find min and max

Count Positives

Values Greater than Second

This Length, That Value

Add Seven to Most

Values Greater than Second, Generalized

Swap Values