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Switching positions of selected characters in a string in JavaScript
Problem
We are required to write a JavaScript function that takes in a string that contains only the letter ‘k’, ‘l’ and ‘m’.
The task of our function is to switch the positions of k with that of l leaving all the instances of m at their positions.
Example
Following is the code −
const str = 'kklkmlkk'; const switchPositions = (str = '') => { let res = ""; for(let i = 0; i < str.length; i++){ if (str[i] === 'k') { res += 'l'; } else if (str[i] === 'l') { res += 'k'; } else { res += str[i]; }; }; return res; }; console.log(switchPositions(str));
Output
Following is the console output −
llklmkll
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