Introductionfor statement in javascript (for loop)
for statement is used to execute the for block statements number of times based on the condition.
It is important to note that the for loop must be handled correctly, because in some cases the condition may always return true then infinite loop will occur. Because of this, for loop won't terminate to the next statement.
Syntax
[] - This symbol denotes optional.
Flowchart
Execution flow of above example
Step 1 - image explanation- Variable i is created and value 0 is assigned to it (var i=0).
- A condition (i<3) is checked, and it is true (0<3).
- Alert statement in for loop executes (alert(0)).
- i value is incremented by 1(i++).
- A condition (i<3) is checked, and it is true (1<3).
- Alert statement in for loop executes (alert(1)).
- i value is incremented by 1(i++).
- A condition (i<3) is checked, and it is true (2<3).
- Alert statement in for loop executes (alert(2)).
- i value is incremented by 1(i++).
- A condition (i<3) is checked, and it is false (3<3).
- for loop is terminated and execute the next statement (alert("Finished")).