Inspecting changes with git diff

Main purpose of git is to provide you a way to work with different versions of files, and when we work with different files sometimes we need a way to see the difference between them. git diff is a command that allows us to compare different versions of files, you can use this command to compare different branches, commits, files. Let's see some examples.

If you execute only git diff without any options, git will show you all changes that you've made locally in your working directory and that are unstaged. If you want to see staged changes then you have to add --staged option.

➜  git-basics-beginners git:(master) ✗ git status
On branch master
Your branch is up to date with 'origin/master'.

You are currently rebasing.
  (all conflicts fixed: run "git rebase --continue")

Changes not staged for commit:
  (use "git add <file>..." to update what will be committed)
  (use "git checkout -- <file>..." to discard changes in working directory)

  modified:   README_book.md

no changes added to commit (use "git add" and/or "git commit -a")

➜  git-basics-beginners git:(master) ✗ git diff

diff --git a/README_book.md b/README_book.md
index 0e23653..891d12c 100644
--- a/README_book.md
+++ b/README_book.md
@@ -24,6 +24,8 @@
     - [Changing commit message](#changing-commit-message)
     - [Rules of the good commit message](#rules-of-the-good-commit-message)

+  - [**- Inspecting changes with Git Diff -**](#inspecting-changes-with-git-diff)
+
   - [**- Ignoring files in _git_ -**](#ignoring-files-in--git-)

   - [**- Cleaning untracked files -**](#cleaning-untracked-files)
@@ -513,6 +515,14 @@ index 0b19467..55e0d78 100644


+Inspecting changes with Git Diff
+
+Main purpose of _git_ is to provide you a way to work with different versions of files,
 and when we work with different files sometimes we need a way to see the difference
 between them. `git diff`is a command that allows as to compare different versions of files,
 you can use this command to compare different branches, commits, files. Let's see some examples.
+

When you want to see changes between two different commits:

$ git diff c870d10..71d278e

To compare two branches you have to specify names of branches separated with two dots;

$ git diff master..add-log-live-script