One declaration for each in repeating a specified variable over all values ​​of the object's properties. For each distinct property, a specific declaration is executed.

foreach.ts

const mySkills = [
  "C#",
  "JavaScript",
  "TypeScript",
  "HTML",
  "CSS3",
  "Angular",
  "ReactJS",
  "React Native",
  "NodeJs",
  "MongoDB",
  "Python",
  "C",
];

mySkills.forEach((value, index) => {
  console.log(`${index + 1}. ${value}`);
});