YiningChen/flw2-u1l5-23-24-student-exercises

Lesson 1.5: Loops

for Loops

• Allows us to iterate over array elements.
• Consists of initialization, condition, and afterthought.
• for (initialization; condition; afterthought) { /* code */ }

for (let i = 0; i < 4; i++) {
  console.log(i); // Output: 0, 1, 2, 3
}

Initialization

• Usually initializes a loop counter.

Condition

• Loop runs until this condition is false.

Afterthought

• Updates the loop counter's value after each iteration.

forEach Loops

• Calls a function once for each element in an array.

let fruits = ["peach", "apple", "lemon"];
fruits.forEach(function(fruit) {
  console.log(fruit);
});

for of Loops

• A more concise alternative to forEach loops.

let fruits = ["peach", "apple", "lemon"];
for (let fruit of fruits) {
  console.log(fruit); // Output: peach, apple, lemon
}

Which Loop to Use?

• for loops offer precision and flexibility.
• forEach and for of loops iterate through entire arrays; forEach is similar to other array functions, while for of is concise.
• Choice depends on requirements and personal preference.

Other Loops

• There are various other loops available, such as for in, while, and do…while.

Happy coding!