javascript for loop for object code example

Example 1: javascript loop through object

var p = {
    "p1": "value1",
    "p2": "value2",
    "p3": "value3"
};

for (var key in p) {
    if (p.hasOwnProperty(key)) {
        console.log(key + " -> " + p[key]);
    }
}

Example 2: for of loop javascript

const array1 = ['a', 'b', 'c'];

for (const element of array1) {
  console.log(element);
}

// expected output: "a"
// expected output: "b"
// expected output: "c"

Example 3: for in loop javascript

let array = [1,2,3,4,5,6,7,8,9,10]; 
// our array that we will use the for loop on
for (let i = 0; i < array.length; i++) { 
  // this loop will console log the element at array[i] starting at 0
  // and will continue looping for i < array.length 
  console.log(array[i]);
  // after each loop i will increase by 1
}

// this will console log
// 1
// 2
// 3
// 4
// 5
// 6
// 7
// 8
// 9
// 10