Array is Collection of More Items in a given Sequence

• saving multiple data in a single line.

/**
 * Arrays --> Non-Primitive Data Types
 */

let studentsName = ["Sai", "Krishna", "Vijay", "Sundeep", "Sony"];
console.log(studentsName[0 ]);
console.log(studentsName[1]);
console.log(studentsName[2 ]);
console.log(studentsName[3 ]);
console.log(studentsName[4 ]);

OP: Sai
Krishna
Vijay
Sundeep
Sony

There is an problem printing Number of Times console.log so we use (DRY) Principle, Dont Repeat Yourself

Using for Loop : We can use simple line of code!

let studentsName = ["Sai", "Krishna", "Vijay", "Sundeep", "Sony"];

for (let i=0; i<6; i++) {
    console.log(studentsName[i]);
}

OP: Sai
Krishna
Vijay
Sundeep
Sony
undefined

we cant give every time length so we use array length to use this as it may be any it will be printing

/**
 * Arrays --> Non-Primitive Data Types
 */

let studentsName = ["Sai", "Krishna", "Vijay", "Sundeep", "Sony"];

let arrLength = studentsName.length; // Number of students printing using array length & for Condition

for (let i=0; i<arrLength; i++) {
    console.log(studentsName[i]);
}

OP : It will executre all 

The For Let off :

The for...of loop is a concise and elegant way to iterate over the values of an iterable object, such as an array, in JavaScript. It provides a simpler syntax compared to traditional for loops, making it a popular choice for many common array operations.

• when we dont use indexing we can use for let off

let studentsName = ["Sai", "Krishna", "Vijay", "Sundeep", "Sony"];

// let arrLength = studentsName.length; // Number of students printing using array length & for Condition

// for (let i=0; i<arrLength; i++) {
//     console.log(studentsName[i]);
// }

/** for Let of  */
for(let name of studentsName) {
    console.log(name);    // for let of is used when we no need indexing
}

OP : Sai
Krishna
Vijay
Sundeep
Sony
undefined

IMP : for let off is used when you will not use delete operations or add thse operations we can use it

For Let IN :

/** for let in  */

for (let name  in studentsName) {
    console.log(name);    //it gives the indexing as output
}

for (let index in studentsName) {
    console.log(studentsName[index]);    // printing the values using indexing
}

OP: 
**0
1
2
3
4
Sai
Krishna
Vijay
Sundeep
Sony**

• for let in uses to printing indexing as the student name as the out put