Loops

Question 1

for loop

Answer 1

The for loop allows you to execute a block of code a specific number of times.

for (let i = 0; i < 5; i++) {
console.log(i);
}
Output:
0
1
2
3
4

Question 2

while loop

Answer 2

The while loop repeats a block of code as long as a specified condition is true.

let i = 0;
while (i < 5) {
console.log(i);
i++;
}

Output:
0
1
2
3
4

Question 3

do-while loop

Answer 3

Similar to the while loop, the do-while loop also repeats a block of code as long as a specified condition is true. However, the code block is executed at least once before

let i = 0;
do {
console.log(i);
i++;
} while (i < 5);

Output:
0
1
2
3
4

Question 4

for…in loop

Answer 4

The for…in loop iterates over the properties of an object.

const person = { name: “John”, age: 30, city: “New York” };
for (let key in person) {
console.log(key + “: “ + person[key]);
}

Output:
name: John
age: 30
city: New York

Question 5

for…of loop

Answer 5

The for…of loop iterates over iterable objects such as arrays, strings, or other iterable collections.

const fruits = [“apple”, “banana”, “orange”];
for (let fruit of fruits) {
console.log(fruit);
}

Output:
apple
banana
orange