diff --git a/.gitignore b/.gitignore
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@@ -1,2 +1,3 @@
 venv
-.idea
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+.idea
+__pycache__
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diff --git a/README.md b/README.md
index c9dd186..e6c6f80 100644
--- a/README.md
+++ b/README.md
@@ -1,6 +1,8 @@
 # ![Resistor Symbol](https://upload.wikimedia.org/wikipedia/commons/c/c3/Resistor_symbol_IEC.svg) Simple Resistor Calculator
-A college mini project.
+A college mini project for calculating a resistor's resistance.
 
 ## How to use
+Run `python main.py`.
+
 The program will ask you to enter 5 resistor band colors. It will then calculate the resistance and tolerance of the
 resistor from the band colours that you have entered.
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