Google sheets script - how to concate variable? - variables

Question

I have this code:
function _1() {
var aa = SpreadsheetApp.getActiveSpreadsheet();
var sheet = aa.getSheets()[0];
var cell = sheet.getRange("k1");
var cell = sheet.getvalue("a" + cell + ")");
};
In cell k1 there is a number (variable). I want to use this cell in my function, but its not work for me.

Answer 1

You entire code is correct, except last line:
var cell = sheet.getvalue("a" + cell + ")")
You don't need to import range value again in your getValue and it will cause error, and below is the correct execution by convert value to string (*remove ; after } ):
function test_1() {
var aa = SpreadsheetApp.getActiveSpreadsheet();
var sheet = aa.getSheets()[0];
var cell = sheet.getRange("B2").getValue();
cell = cell.toString() + "a"
Logger.log(cell);
}

Answer 2

Answer
getValue() does not take any input parameter. Join the strings later
Solution
I attach you a function that reads the number in B2 (X) and writes a string in AX.
function test_1() {
var aa = SpreadsheetApp.getActiveSpreadsheet();
var sheet = aa.getSheets()[0];
var B2 = sheet.getRange("B2").getValue();
var cell = "A" + B2.toString()
sheet.getRange(cell).setValue('test')
}
References
Range.getValue()
Range.setValue(value)