minor edits

Author: tomvannuenen

lessons/1_Jupyter_and_Python.ipynb

@@ -178,7 +178,7 @@
    "source": [
     "This is cool, but how can we save the result of this calculation?\n",
     "\n",
-    "In Python, we can assign a value to a variable, using the equals sign `=`. For example, we can track the multiplication of some country's population and GDP per capita in a variable `gdpTotal`.\n"
+    "In Python, we can assign a value to a variable, using the equals sign `=`. For example, we can track the above calculation in a variable called `a`."
    ]
   },
   {
@@ -187,17 +187,17 @@
    "metadata": {},
    "outputs": [],
    "source": [
-    "gdpTotal = 60000 * 778\n",
+    "a = 10 + 4 * 2\n",
     "\n",
     "# Printing our new variable\n",
-    "print(gdpTotal)"
+    "print(a)"
    ]
   },
   {
    "cell_type": "markdown",
    "metadata": {},
    "source": [
-    "From now on, whenever you refer to `gdpTotal`, Python will substitute the value we assigned to it. "
+    "From now on, whenever you refer to `a`, Python will substitute the value we assigned to it. "
    ]
   },
   {
@@ -213,7 +213,7 @@
    "metadata": {},
    "outputs": [],
    "source": [
-    "gdpTotal"
+    "a"
    ]
   },
   {
@@ -222,7 +222,7 @@
    "source": [
     "## 🥊 Challenge 2: Executing Cells Multiple Times\n",
     "\n",
-    "Try using **Shift + Enter** to run the following cell three times. What is the output?"
+    "Try using **Shift + Enter** to run the following cell three times. What is the output? Can you explain what is happening?"
    ]
   },
   {