Add README.md to sqrt example

SqrtExample/README.md

+# Requirements
+
+  * Python 3.7
+
+> This code makes use of the `f"..."` or [f-string
+> syntax](https://www.python.org/dev/peps/pep-0498/). This syntax was
+> introduced in Python 3.6.
+
+
+# Sample Execution & Output
+
+If run using
+
+```
+./sqrt_demo.py
+```
+
+output *simliar* to
+
+```
+ sqrt(1 + 10^-0 ) = 1.41421356237309514547462185873882845044136047363281
+ sqrt(1 + 10^-1 ) = 1.04880884817015163079645390098448842763900756835938
+ sqrt(1 + 10^-2 ) = 1.00498756211208895017250597447855398058891296386719
+ sqrt(1 + 10^-3 ) = 1.00049987506246096380380095069995149970054626464844
+ sqrt(1 + 10^-4 ) = 1.00004999875006239662411644530948251485824584960938
+ sqrt(1 + 10^-5 ) = 1.00000499998750003172176548105198889970779418945312
+ sqrt(1 + 10^-6 ) = 1.00000049999987505877641069673700258135795593261719
+ sqrt(1 + 10^-7 ) = 1.00000004999999880794803175376728177070617675781250
+ sqrt(1 + 10^-8 ) = 1.00000000499999996961264514538925141096115112304688
+ sqrt(1 + 10^-9 ) = 1.00000000050000004137018549954518675804138183593750
+ sqrt(1 + 10^-10) = 1.00000000005000000413701854995451867580413818359375
+ sqrt(1 + 10^-11) = 1.00000000000500000041370185499545186758041381835938
+ sqrt(1 + 10^-12) = 1.00000000000050004445029117050580680370330810546875
+ sqrt(1 + 10^-13) = 1.00000000000004996003610813204431906342506408691406
+ sqrt(1 + 10^-14) = 1.00000000000000488498130835068877786397933959960938
+ sqrt(1 + 10^-15) = 1.00000000000000044408920985006261616945266723632812
+ sqrt(1 + 10^-16) = 1.00000000000000000000000000000000000000000000000000
+ sqrt(1 + 10^-17) = 1.00000000000000000000000000000000000000000000000000
+ sqrt(1 + 10^-18) = 1.00000000000000000000000000000000000000000000000000
+ sqrt(1 + 10^-19) = 1.00000000000000000000000000000000000000000000000000
+```
+
+will be generated. Note that the output may vary.
+

SqrtExample/sqrtDemo.py → SqrtExample/sqrt_demo.py

@@ -4,5 +4,6 @@ import math
 
 if __name__ == "__main__":
 
-    for d in range(0, 20):
-        print("{:>50.20f}".format(math.sqrt(1 + 10 ** -d)))
+    for power in range(0, 20):
+        result = math.sqrt(1 + 10 ** -power)
+        print(f" sqrt(1 + 10^-{power:<2d}) = {result:>50.50f}")