Javascript Practice 04: JS Hero - Reassignment


Question: 

Which value does x have after execution of the following code?

let x = 'Tic';

x = 'Tac';

x = 'Toe';




Answer: 

'Toe'

Declared a variable using let.
You can reassign a new value to a variable using the = operator as shown above. 

Comments

Post a Comment

Popular posts from this blog

Junior Developer Central JS Practice Exercise - 22

  Question:  Write a Javascript function that accepts a string as a parameter and counts the number of vowels within the string.  Answer:  function vowelCount (str) {   let vowels = /[aeiou]/gi;   let result = str.match(vowels);   let count = result.length;   return count;       }; > we declare a function 'vowelCount'  > it has one parameter 'str', which is a string > we declare a variable 'vowels' and initialize it with the 5 vowels > the 'g' modifier is used on the 'vowels' variable to perform a global match  > a global match will find all matches and will not stop after finding the first match >  additionally   the 'i' modifier is used  on the 'vowels' variable to perform case insensitive matching > we declare another variable 'result' and initialize it with the result we get when we use the match () method on the 'str' parameter > the match() method searches a string for a ma...
Read more

Junior Developer Central JS Practice Exercise - 21

  Question:  Write a Javascript function that returns a passed string with letters in alphabetical order.  Example String:            'javascript'  Example Output:             ' aacijprstv' Answer:  function alphaStr (str) { return str.split('').sort().join('') }            > we declare a function 'alphaStr'  > it has one parameter 'str'  > we use the split ('') method on the string 'str' to split all the characters in an array > we then use the sort() method to sort the characters in alphabetical order > we then use the join('') method to create a string by concatenating all the sorted elements of the array created  > we return this line of code to get our alphabetically sorted string
Read more

Javascript Practice 68: JS Hero - do...while loop

  Question:  Write a function lcm that takes two natural numbers and calculates their least common multiple (lcm). The lcm of two natural numbers a und b is the smallest natural number that is divisible by a and b. Example: lcm(4, 6) should return 12. Answer:  function lcm(a, b) {   let theLCM = 0;   let remainderA;   let remainderB;   do {     theLCM++;     remainderA = theLCM % a;     remainderB = theLCM % b;   } while (remainderA !== 0 || remainderB !== 0)   return theLCM; } > we declare a function lcm > it has 2 parameters: 'a' and 'b' > we declare a variable 'theLCM' & initialize it with a value of 0;  > we declare 2 empty variables: 'remainderA' & 'remainderB'  > we open a do while loop  > do/while loop is a variant of the while loop > this loop will execute the code block once, before checking if the condition is true > then it will repeat the loop a...
Read more