I am trying to reverse a string but I will get a value as follows when i console.log in chrome console:
function reverseString(str) {
let newString = "";
for (let i = str.length; i + 1 > 0; i--) {
newString = newString + str[i];
}
return (newString);
}
console.log(reverseString("hello there"));Why is there undefined in front of the reverse string?
You start at an i of str.length. On the first iteration, str[i] resolves to str[str.length], but strings are zero-indexed, not one-indexed, so that will always be undefined. Start at str.length - 1 instead:
function reverseString(str) {
let newString = "";
for (let i = str.length - 1; i + 1 > 0; i--) {
newString = newString + str[i];
}
return (newString);
}
console.log(reverseString("hello there"));