How to loop and iteration executations in Ansible Playbook with Example?

Example Playbook Code


---
- name: Update web servers
  hosts: web
  vars:
    listvar1:
      - 'a'
      - 'b'
      - 'c'

  tasks:
  - name: Install Apache in centos7
    ansible.builtin.yum:
      name: "{{ item }}"
      state: latest
    with_items:
      - git
      - httpd
      - ntp
  - name: Copy index.html
    ansible.builtin.copy:
      src: index.html
      dest: /var/www/html/index.html
  - name: Starting a Apache Server
    ansible.builtin.service:
      name: httpd
      state: started
  - command: echo {{ item }}
    loop: [ 0, 2, 4, 6, 8, 10 ]
  - command: echo {{ item }}
    loop: [ 0, 2, 4, 6, 8, 10 ]
    when: item > 5
  - name: Remove users Chuck and Craig from the system.
    user:
      name: "{{ item }}"
      state: absent
      remove: yes
    with_items:
      - chuck
      - craig
  - shell: echo "nested test a={{ item[0] }} b={{ item[1] }} c={{ item[2] }}"
    with_nested:
      - [ 'red', 'blue', 'green' ]
      - [ 1, 2, 3 ]
      - [ 'up', 'down', 'strange']
  - shell: echo "nested test a={{ item[0] }} b={{ item[1] }}"
    with_nested:
     - listvar1
     - [ 1, 2, 3 ]

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Rajesh Kumar