How to declare volatile variables in Swift

Question

I want to convert to Swift from Objective-C code like following;

int sum = 0;
x = 1;
for (int i = 0; i < 100; i++) {
    sum += x;
}

x is ac

Answer 1

If you want to use x from anywhere, then you need to write this variable like this, var x = 0

• Original code :

int sum = 0; x = 1; for (int i = 0; i < 100; i++) { sum += x; }

Updated code :

var sum = 0 x = 1 for (i in 0..<100) { sum = sum + x }

• var sum = 0 you can define this variable to anywhere in the class or outside too.
• let sum = 0 you will not able to edit that value.

Let us know if any confusion here.