JavaScript in Operator

function gfg() {
    // Illustration of in operator 
    const array = ['geeks', 'for',
        'geeks']

    // Output of the indexed number 
    console.log(0 in array);

    // Output of the Value 
    console.log('for' in array);

    // output of the Array property 
    console.log('length' in array);
}
gfg();

// Illustration of in operator
const array = ['geeksforgeeks', 'geeksfor',
    'geeks', 'geeks1']

// Output of the indexed number
console.log(0 in array)
console.log(2 in array)
console.log(5 in array)

// Output of the Value
console.log('for' in array)
console.log('geeksforgeeks' in array)

// output of the Array property
console.log('length' in array)

// Illustration of in operator
const object = {
    val1: 'Geeksforgeeks',
    val2: 'Javascript',
    val3: 'operator',
    val4: 'in'
};

console.log('val1' in object);

delete object.val1;
console.log('val1' in object);

if ('val1' in object === false) {
    object.val1 = 'GEEKSFORGEEKS';
}

console.log(object.val1);