What is the for loop process?

Question

<script>

var x=0;
for(var i=0;i<5;i++){
x++;
break
}
console.log(x)
</script>

Answer 1

 • Skipping parts ;)

Any part of 'for' can be skipped.

For example, we can omit 'begin' if we don’t need to do anything at the loop start.

let i = 0; // we have i already declared and assigned

for ( ; i < 3; i++) { // no need for "begin"
    alert( i ); // 0, 1, 2
}

We can also remove the 'step' part:

let i = 0;

for ( ; i < 3; ) {
    alert( i++ );
}

The loop became identical to while (i < 3).

We can actually remove everything, thus creating an infinite loop:

for ( ; ; ) {
    // repeats without limits
}

Please note that the two 'for' semicolons ; must be present, otherwise it would be a syntax error.

Answer 2

 • The For Loop

It’s the most basic of loops in JavaScript and is quite versatile.

for (i = 0; i < 10; i++) {
    // do something
}

Our for loop consists of three statements, one that is executed before our loop starts ( i = 0 ), one that defines how long our loop should run ( i < 10 ), and one that is executed after each loop ( i++ ).

In this example, we are setting i = 0 before our loop starts. We will continue to loop as long as i < 10, and each iteration of the loop will increase i by one. Finally, within our brackets is the code that will be run on each iteration of the loop.

Answer 3

This loop can only run 1 iteration because of the break statement inside. X get equal to 1 because if the incrementation and then finally reach out the loop scope and print 1 to the console.

Answer 4

Thanks guys 😊