JavaScript Basic: For Loop Study Note

For loop is another way of repeating code.

for( initial; condition; step) {
//run some code
}

As you see, for loop includes three part:

• The first part is the initialize where we declare a variable and set it to some initial value.
• The second part is condition which is when this loop should keep running.
• The last part is step, so what do we do at the end of every iteration.

I would like to share two examples from the course:

Print numbers from 0 to 5 with a for loop

I write the for loop in the console. There are three part in the for loop: 

1. Initial: count start from 0 (count = 0) 

2. Condition: run the code until the count is less than 6 ( count < 6)

3. Step: count incrementally

The result list 0 to 5.

Print each character in a string with a for loop

1. Initial: list the character from the beginning (start 0) 

2. Condition: run the code until it end by the string length 

3. Step: list all the characters in order

The result list each character for "hello"