JavaScript For...In Statement

JavaScript For...In Statement

The for...in statement loops through the properties of an object.

Syntax

for (variable in object)
  {
  code to be executed
  }

Note: The block of code inside of the for...in loop will be executed once for each property.

Example

Looping through the properties of an object:

Example

var person={fname:"John",lname:"Doe",age:25};

for (x in person)
  {
  txt=txt + person[x];
  }

Try it yourself »