JavaScript For Loop

• 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
}

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

For of

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

for of Must be iterable

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For in

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