Arithmetic Challenge

The 'add', 'subtract', 'multiply', and 'divide' functions are designed to perform basic arithmetic operations on two input numbers. 'add' returns the sum of the two numbers, 'subtract' returns the difference, 'multiply' returns the product, and 'divide' returns the result of dividing the first number by the second. The 'divide' function includes a conditional check to avoid division by zero.

The 'calculator' function serves as the main program for a simple calculator. It prompts the user to select an operation (add, subtract, multiply, or divide) and input two numbers. Based on the user's choice, it calls the corresponding arithmetic function and displays the result.

The conditional statement in the 'divide' function checks if the second input number (denominator) is equal to zero. If the denominator is zero, the function returns an error message to avoid division by zero. This conditional statement ensures that the program handles potential division by zero errors.

<p>The line 'if <strong>name</strong> == &quot;<strong>main</strong>&quot;: calculator()' is a Python idiom that ensures the 'calculator' function is executed only when the script is run directly, rather than being imported as a module into another script. It allows the 'calculator' function to be the entry point of the program.</p> Signup and view all the answers

<p>The 'choice' variable stores the user's selection of the arithmetic operation (add, subtract, multiply, or divide). In the 'calculator' function, it is used to determine which arithmetic function to call based on the user's input. The 'choice' variable controls the flow of the program by directing it to the appropriate operation.</p> Signup and view all the answers

<p>5 * 4 = 20</p> Signup and view all the answers

<p>8 - 3 = 5</p> Signup and view all the answers

<p>6 + 9 = 15</p> Signup and view all the answers

<p>Error: Division by zero</p> Signup and view all the answers

<p>Invalid input. Please enter a valid operator (1/2/3/4).</p> Signup and view all the answers