gui calc

guicalc.py

@@ -0,0 +1,90 @@
+# Import the tkinter library for creating GUI applications
+import tkinter as tk
+
+# Create the main application window
+root = tk.Tk()
+root.title("Calculator")          # Set the window title
+root.geometry("300x400")           # Set window size (width x height)
+
+# Create an Entry widget to display numbers and results
+entry = tk.Entry(
+    root,
+    font=("Arial", 20),             # Font style and size
+    borderwidth=5,                  # Thickness of border
+    relief="ridge",                 # Border style
+    justify="right"                 # Align text to the right
+)
+entry.pack(fill="both", padx=10, pady=10)
+
+# Function to insert numbers/operators when a button is clicked
+def click(value):
+    entry.insert(tk.END, value)     # Insert value at the end of the entry box
+
+# Function to clear the display
+def clear():
+    entry.delete(0, tk.END)         # Delete everything from entry box
+
+# Function to evaluate the expression
+def calculate():
+    try:
+        # Evaluate the mathematical expression entered by the user
+        result = eval(entry.get())
+        entry.delete(0, tk.END)     # Clear entry box
+        entry.insert(tk.END, result)  # Display result
+    except:
+        # If any error occurs (invalid expression)
+        entry.delete(0, tk.END)
+        entry.insert(tk.END, "Error")
+
+# List of calculator buttons in order
+buttons = [
+    '7', '8', '9', '/',
+    '4', '5', '6', '*',
+    '1', '2', '3', '-',
+    '0', '.', '=', '+'
+]
+
+# Create a frame to hold all the buttons
+frame = tk.Frame(root)
+frame.pack()
+
+row = 0
+col = 0
+
+# Create buttons dynamically using a loop
+for btn in buttons:
+    if btn == "=":
+        # '=' button performs calculation
+        tk.Button(
+            frame,
+            text=btn,
+            width=5,
+            height=2,
+            command=calculate
+        ).grid(row=row, column=col)
+    else:
+        # Other buttons insert numbers/operators
+        tk.Button(
+            frame,
+            text=btn,
+            width=5,
+            height=2,
+            command=lambda b=btn: click(b)
+        ).grid(row=row, column=col)
+
+    col += 1
+    if col > 3:                     # Move to next row after 4 buttons
+        col = 0
+        row += 1
+
+# Clear button placed below the calculator buttons
+tk.Button(
+    root,
+    text="Clear",
+    width=20,
+    height=2,
+    command=clear
+).pack(pady=10)
+
+# Start the GUI event loop
+root.mainloop()