A For loop without curly braces (curly braces) can also be executed correctly

Code One

The For loop has no {} curly braces (curly braces), and a statement below the for statement.

 for (var i=0;i<3;i++) console.log (1,i);

The above code can be output without error:

1 0
1 1
1 2

Code two

So, what if there are multiple lines in the For loop without curly braces?

 for (var i=0;i<3;i++) console.log (1, i); Console.log (2)

Output:

1 0
1 1
1 2
2

He would not cycle the second line.

Code Three

 for (var i=0;i<3;i++) console.log (1,i); Console.log (2) Console.log (3)

What if there are multiple statements and multiple lines of statements under the For loop?

1 0
1 1
1 2
2
3

Only the first statement is executed.

If

if (true) Console.log (1) Console.log (2)//1//2if( False) Console.log (1) Console.log (2)//2

Obviously, if is also the case.

While

 while (true) Console.log (1)

I was embarrassed to do that for a moment.

Conclusion:

In most programming languages, you can omit curly braces if there is only one statement in the contents of an if, for, and while statement.

Note: Is a statement , not a line.

For example, JS with a semicolon, the expression of a statement, so the above example, although the two statements on the same line, but only loop the previous statement.

A For loop without curly braces (curly braces) can also be executed correctly