How to compare two floating point numbers in Bash?

How to compare two floating point numbers in Bash?

In Bash, you can compare two floating-point numbers using tools like awk or bc. Here's an example using awk:

#!/bin/bash float1=3.14 float2=2.71 result=$(awk 'BEGIN{ print "'"$float1"'"<"'"$float2"'" }') if [ "$result" -eq 1 ]; then echo "$float1 is less than $float2" elif [ "$result" -eq 0 ]; then echo "$float1 is equal to $float2" else echo "$float1 is greater than $float2" fi

In this script:

  1. awk is used to perform the floating-point comparison in a BEGIN block.
  2. The result is stored in the result variable.
  3. Bash conditional statements (if, elif, else) are used to check the result and print the appropriate message.

Make sure to replace the values of float1 and float2 with the floating-point numbers you want to compare.

Note: Floating-point comparisons can sometimes be tricky due to precision issues. If you need more precise comparisons, you might want to consider using a language with better floating-point support, such as Python or Perl.

Examples

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