corrected code style

contents/thomas_algorithm/code/javascript/thomas.js

@@ -1,28 +1,28 @@
 function thomas(a, b, c, x) {
-let y = [];
+const y = [];
 
 y[0] = c[0] / b[0];
 x[0] = x[0] / b[0];
 
 for (let i = 1; i < a.length; i++) {
-let scale = 1.0 / (b[i] - a[i] * y[i - 1]);
+const scale = 1 / (b[i] - a[i] * y[i - 1]);
 y[i] = c[i] * scale;
 x[i] = (x[i] - a[i] * x[i - 1]) * scale;
 }
 
 for (let i = a.length - 2; i >= 0; i--)
 x[i] -= y[i] * x[i + 1];
+
+return x;
 }
 
-let a = [0.0, 2.0, 3.0];
-let b = [1.0, 3.0, 6.0];
-let c = [4.0, 5.0, 0.0];
-let x = [7.0, 5.0, 3.0];
+let a = [0, 2, 3];
+let b = [1, 3, 6];
+let c = [4, 5, 0];
+let x = [7, 5, 3];
 
 console.log("The system,");
 console.log("[1.0 4.0 0.0][x] = [7.0]");
 console.log("[2.0 3.0 5.0][y] = [5.0]");
 console.log("[0.0 3.0 6.0][z] = [3.0]");
-console.log("has the solution:\n", x);
-
-thomas(a, b, c, x);
+console.log("has the solution:\n", thomas(a, b, c, x));