add floating point calculation functions

[icasimpan]

c/o https://tecadmin.net/bash-floating-point-math-calculations/

Addition/ Subtraction

num1=3.14
num2=1.73
 
# Addition
result=$(echo "scale=2; $num1 + $num2" | bc)
echo "Addition: $result"
 
# Subtraction
result=$(echo "scale=2; $num1 - $num2" | bc)
echo "Subtraction: $result"

Multiplication/Division

num1=5.25
num2=2.5
 
# Multiplication
result=$(awk "BEGIN { printf(\"%.2f\", $num1 * $num2) }")
echo "Multiplication: $result"
 
# Division
result=$(awk "BEGIN { printf(\"%.2f\", $num1 / $num2) }")
echo "Division: $result"