This project is in javascript. I need to make sure the output retains spaces found in the string that is inputted into the function. The test I am trying to pass is calling the function for the term "hello world" with a shift of 13 letters. From this code, the result is "uryybjbeyq" and "uryyb jbeyq" is expected. I have identified I need an if statement which I have included already, but not sure what command I should include before the continue keyword that will insert the space needed. I am a beginner and this is only my 3rd project so any assistance would be appreciated. Please find the corresponding code below.
function caesarCypher(string, num){
// line below is the encrypted string we will return from the function
const letters = 'abcdefghijklmnopqrstuvwxyz';
let encryptStr = ""
// loop through every character in the inputted string
for(let i = 0; i < string.length; i++){
// line below will look up index of char in alphabet
let char = string[i];
/* if statement below is attempting to identify the space in the original string and then add a command that will add a space to the encrypted string then continue to work through the rest of the input */
if (char === " ") {
//need something to put on this line to insert space;
continue;
}
let index = letters.indexOf(char);
// index + num below will give us the letter 7 spots over
let newIndex = index + num;
// if statement below makes the function loop back around
if (newIndex > 26) {
newIndex = newIndex - 26;
}
let newChar = letters[newIndex];
encryptStr += newChar;
}
return encryptStr;
}
/* invoke the function with these parameters to pass the test-- expected result is 'uryyb jbeyq'*/
caesarCypher("hello world", 13)
You can add the white space like this:
encryptStr += " ";
I tried your code and I ran into an error... All letters were the same. Here is how I did it:
function caesarCypher(string, num){
let encryptStr = "";
for(let i = 0; i < string.length; i++){
let char = string[i];
if (char === " ") {
encryptStr += " "; //This adds a white space.
continue;
}
// If you want to keep the case of a letter, skip the
// "toLowerCase()" and extend the condition below.
let asciiCode = string.toLowerCase().charCodeAt(i) + num;
if(asciiCode > 122) {
asciiCode -= 26;
}
encryptStr += String.fromCharCode(asciiCode);
}
return encryptStr;
}