Googlescript 'if' question - do only one of two tasks - if-statement

Question

I have 'else if' statements and I need it to be called only if the previous 'if' does not execute. First 'if' (check status) work perfect, second work to, but the 'else if' is done every time because there are different types in the table (A, B, C e.t.c)
Edit:
1. New line must be add if there's no open A;
2. If there are open more than one A - all are must be closed;
3. Ignore all other types and add new line only if there are no As open;
Here is my code:
function myFunction() {
var sheet = SpreadsheetApp.getActiveSpreadsheet().getSheetByName('SheetName');
var data = sheet.getRange(2,1,sheet.getLastRow(),2).getValues();
var nextRow = SpreadsheetApp.getActiveSheet().getDataRange().getLastRow()+1;
for (var i=0; i<data.length; i++){
var row = data[i];
var type = row[0];
var status = row[1];
//check it always
if (status != 'close'){
//check first and if it's true don't do 'else if'
if (type == 'A') {
sheet.getRange(i+2,2).setValue('close')
}
//this should only be called if the previous 'if' is not true
else if (type != 'A' && type != ''){
var values = [['A','open']];
sheet.getRange("A"+nextRow+":B"+nextRow).setValues(values);
}
}
}
}

Answer 1

Flow:
Loop through all data to find if there's a "A:Open"
If found in all of data, just close that row
else, Add a new line: "A:Open"
Use a Boolean variable(isThereASingleAOpen) to keep track of A:Open found status
Sample script:
function closeAandAddOpenA() {
var sheet = SpreadsheetApp.getActiveSpreadsheet().getSheetByName('SheetName');
//Separate range and data
var range = sheet.getRange(2, 1, sheet.getLastRow(), 2);
var data = range.getValues();
//Is there a A Open in the data? Let's assume there's none
var isThereASingleAOpen = false;
//Loop through data array
for (var i = 0; i < data.length; i++) {
var row = data[i];
var type = row[0];
var status = row[1];
//If status is != close and type == 'A'
if (status != 'close' && type == 'A') {
//Change current row status to close in the data array
row[1] = 'close';
//Oops We were wrong. There was a A open in the data
isThereASingleAOpen = true;
}
} //Loop closed
//Set the modified data back to the range
//Batch operations are faster
range.setValues(data);
//if there is NOT a single A open in all of data, Append a new line
if (!isThereASingleAOpen) {
sheet.appendRow(['A', 'Open']);
}
}