diff --git a/string_format_test.py b/string_format_test.py
new file mode 100644
index 0000000..62ebcb5
--- /dev/null
+++ b/string_format_test.py
@@ -0,0 +1,13 @@
+#!/usr/bin/env python3
+
+if __name__ == "__main__":
+    print(f"Price {1:.2f}")
+    print(f"Price {3.1415:.2f}")
+    print(f"Price {300000000.1415:,.2f}")
+
+    print(f"Value hex {1000:x}")
+    print(f"Value hex {1000:X}")
+    print(f"Value hex {1:.2%}")
+
+    print("Price {0:,.2f}, count {1}".format(100, 100))
+    print("Price {price:,.2f}, count {count}".format(price=100, count=100))