Added Ex 11-14: while loops

11_while.zig

@@ -0,0 +1,33 @@
+//
+// Zig 'while' statements create a loop that runs while the
+// condition is true:
+//
+//     while (condition) {
+//         condition = false;
+//     }
+//
+// Remember that the condition must be a boolean value and
+// that we can get a boolean value from conditional operators
+// such as:
+//
+//     a == b   a equals b
+//     a < b    a is less than b
+//     a > b    a is greater than b
+//     a !=b    a does not equal b
+//
+const std = @import("std");
+
+pub fn main() void {
+    var n: u32 = 2;
+
+    while ( ??? ){
+        // Print the current number
+        std.debug.print("{} ", .{n});
+
+        // Set n to n multiplied by 2
+        n *= 2;
+    }
+
+    // Make this print n=1024
+    std.debug.print("n={}\n", .{n});
+}