Is it possible to increment the value of i each time myFunction() is called? Currently, i is always initialized to 0, resulting in zero as the output. How can we ensure that i remains a local variable and gets properly incremented? Can this be achieved using closures?
function myFunction(){
var i = 0;
console.log(i);
i++
};
myFunction();
myFunction();
myFunction();
myFunction(); // Desired result: 3
A slight adjustment to the solution provided by @Carlo. This ensures that myFunction remains within the current scope.
let myFunction = (function() {
let i = 0;
return function (){
console.log(i);
i++;
};
})();
For instance:
myFunction(); // outputs 0
myFunction(); // outputs 1
myFunction(); // outputs 2
myFunction(); // outputs 3
Simple solution: remove the variable from the global scope.
(function() {
var num = 0;
myFunction = function (){
console.log(num);
num++
};
})()
myFunction();
myFunction();
myFunction();
myFunction();
By utilizing a more confined scope, you can prevent your variable from becoming global.
One possible solution, as mentioned by others, is to remove the variable from the function's scope. Another approach is to define the variable as a property of the function.
function myFunction() {
if (typeof myFunction.i !== "number") {
myFunction.i = 0;
}
console.log(myFunction.i);
myFunction.i += 1;
}
function calculateResult() {
console.log(i);
calculateResult.i++
};
calculateResult.i = 0;
calculateResult();
calculateResult();
calculateResult(); // The final result should be 2
Declare a variable globally:
let count = 0;
function incrementCounter(){
console.log(count);
count++;
};
incrementCounter();
incrementCounter();
incrementCounter();
incrementCounter(); // The final result should be 3
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