Averages/Arithmetic mean: Difference between revisions

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    swap size [[1 <] [1]] when /
 ].</lang>
+=={{header|Vala}}==
+Using array to hold the numbers of the list:
+<lang vala>
+double arithmetic(double[] list){
+	double mean;
+	double sum = 0;
+	if (list.length == 0)
+		return 0.0;
+	foreach(double number in list){
+		sum += number;
+	} // foreach
+	mean = sum / list.length;
+	return mean;
+} // end arithmetic mean
+public static void main(){
+	double[] test = {1.0, 2.0, 5.0, -5.0, 9.5, 3.14159};
+	double[] zero_len = {};
+	double mean = arithmetic(test);
+	double mean_zero = arithmetic(zero_len);
+	stdout.printf("%s\n", mean.to_string());
+	stdout.printf("%s\n", mean_zero.to_string());
+}
+</lang>
+Output:
+<pre>
+.6069316666666666
+</pre>
 =={{header|Vedit macro language}}==