JavaScript Loop

Apr 3, 2023

TypeScript: Documentation - Iterators and Generators

JavaScript’s  for loop is the same as that in C and Java: it lets you provide the control information for your loop on a single line.

for (let i = 0; i < 5; i++) {
  // Will execute 5 times
}

JavaScript also contains two other prominent for loops:  for…of and for…in

for (let value of array) {
  // do something with value
}

for of Must be iterable

The  for...in statement iterates a specified variable over all the enumerable properties of an object. For each distinct property, JavaScript executes the specified statements. A for...in statement looks as follows:

for (variable in object)
  statement