diff --git a/maths/inter_quartile_range.py b/maths/inter_quartile_range.py
index 421f0d482..3ef4a2694 100644
--- a/maths/inter_quartile_range.py
+++ b/maths/inter_quartile_range.py
@@ -47,11 +47,9 @@ def inter_quartile_range(x: np.array) -> float:
     if length == 0:
         raise ValueError
     x.sort()
-    q1 = find_median(x[0 : length // 2])
-    if length % 2:
-        q3 = find_median(x[(length // 2) + 1 : length])
-    else:
-        q3 = find_median(x[length // 2 : length])
+    q1 = find_median(x[0: length // 2])
+    half_length = (length // 2) + 1 if length % 2 else length // 2
+    q3 = find_median(x[half_length:length])
     return q3 - q1