B.Sc Computer Science with Data analytics

Linux and Shell Programming - Lab

Bharathiar University

Program 5- -Write a shell script (small calculator) that adds, subtracts, multiplies and divides the two given numbers.

Source Code

# Function to perform addition
addition() {
echo "$num1 + $num2" | bc
}

# Function to perform subtraction
subtraction() {
echo "$num1 - $num2" | bc
}

# Function to perform multiplication
multiplication() {
echo "$num1 * $num2" | bc
}

# Function to perform division
division() {
if [ "$num2" -eq 0 ]; then
echo "Error: Division by zero!"
else
echo "scale=2; $num1 / $num2" | bc
fi
}

# Main script starts here

# Prompt the user to enter the first number
echo "Enter the first number: "
read num1

# Prompt the user to enter the second number
echo "Enter the second number: "
read num2

while true; do
# Prompt the user to select the operation
echo "Select the operation:"
echo "1. Addition"
echo "2. Subtraction"
echo "3. Multiplication"
echo "4. Division"
echo "5. Exit"
echo "Enter your choice: "
read choice

case $choice in
1) echo "Addition: $(addition)";;
2) echo "Subtraction: $(subtraction)";;
3) echo "Multiplication: $(multiplication)";;
4) echo "Division: $(division)";;
5) echo "Exiting..."; exit;;
*) echo "Invalid choice";;
esac
done