How to resolve the algorithm Increment a numerical string step by step in the UNIX Shell programming language

Published on 12 May 2024 09:40 PM

How to resolve the algorithm Increment a numerical string step by step in the UNIX Shell programming language

Table of Contents

Problem Statement

Increment a numerical string.

Let's start with the solution:

Step by Step solution about How to resolve the algorithm Increment a numerical string step by step in the UNIX Shell programming language

Source code in the unix programming language

# All variables are strings within the shell
# Although num look like a number, it is in fact a numerical string
num=5
num=`expr $num + 1`    # Increment the number

num=5
let num=num+1          # Increment the number
let "num = num + 1"    # Increment again. (We can use spaces inside quotes)
((num = num + 1))      # This time we use doublebrackets
let num+=1             # This time we use +=
let "num += 1"
((num += 1))

integer num=5          # Declare an integer...
num=$num+1             # ...then increment without the let keyword.

@ num = 5
@ num += 1

  

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