Use Case:

manipulating strings

First Principles:

• slice() extracts a given number of starting at an index (inclusive) and ending at an index (exclusive) elements and returns a new array

  Using for loop

  const truncateString = (str, num) => {
  const cloneStr = str;
  let retStr = '';
  if (num < str.length) {
    const ellipsis = '...';
    retStr = cloneStr.slice(0, num) + ellipsis;
    console.log(retStr)
  } else {
    retStr = cloneStr;
  }
  
  return retStr;
  };
  

Why I had to learn this

I am currently working through JavaScript Data Structures and Algorithms certification