We are required to write a recursive function, say pickString that takes in a string that contains a combination of alphabets and numbers and returns a new string consisting of only alphabets.
For example,
If the string is ‘dis122344as65t34er’, The output will be: ‘disaster’
Therefore, let’s write the code for this recursive function −
Example
const str = 'ex3454am65p43le';
const pickString = (str, len = 0, res = '') => {
if(len < str.length){
const char = parseInt(str[len], 10) ? '' : str[len];
return pickString(str, len+1, res+char);
};
return res;
};
console.log(pickString(str));
console.log(pickString('23123ca43n y43ou54 6do884 i43t'));
console.log(pickString('h432e54l43l65646o'));
console.log(pickString('t543h54is 54i5s 54t43he l543as53t
54ex87a455m54p45le'));Output
The output in the console will be −
example can you do it hello this is the last example