Recently I came across flag variables, but I have no idea what they do.
I am little unsure about when to use a flag variable and how to go about it.
I Googled it but there weren't any specific examples related to my context (of JavaScript).
Flag Variables Defined and Uses says:
A flag variable, in its simplest form, is a variable you define to have one value until some condition is true, in which case you change the variable's value. It is a variable you can use to control the flow of a function or statement, allowing you to check for certain conditions while your function progresses.
As an example:
// errors is the flag variable
var errors = 0;
for(var i = 0; i < 10; i++) {
if(i == 6) { // Your error condition
errors++;
}
}
if(errors) { // Is the flag up? (i.e. > 0)
alert(There was a problem!);
}
