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+Utpl implements C-style while loops which run as long as the condition
+is fulfilled.
+
+Like with for-loops, an alternative syntax form suitable for template
+blocks is supported.
+
+
+-- Expect stdout --
+A simple counting while-loop:
+Iteration 0
+Iteration 1
+Iteration 2
+Iteration 3
+Iteration 4
+Iteration 5
+Iteration 6
+Iteration 7
+Iteration 8
+Iteration 9
+
+
+If the loop body consists of only one statement, the curly braces
+may be omitted:
+Iteration 0
+Iteration 1
+Iteration 2
+Iteration 3
+Iteration 4
+Iteration 5
+Iteration 6
+Iteration 7
+Iteration 8
+Iteration 9
+
+
+A counting while-loop using the alternative syntax:
+Iteration null
+Iteration 1
+Iteration 2
+Iteration 3
+Iteration 4
+Iteration 5
+Iteration 6
+Iteration 7
+Iteration 8
+Iteration 9
+
+-- End --
+
+-- Testcase --
+A simple counting while-loop:
+{%
+	i = 0;
+	while (i < 10) {
+		print("Iteration ");
+		print(i);
+		print("\n");
+		i++;
+	}
+%}
+
+If the loop body consists of only one statement, the curly braces
+may be omitted:
+{%
+	i = 0;
+	while (i < 10)
+		print("Iteration ", i++, "\n");
+%}
+
+A counting while-loop using the alternative syntax:
+{% while (x < 10): -%}
+Iteration {{ "" + x++ }}
+{% endwhile %}
+-- End --