example_conditionals.yml

---
- name: Conditional operator
  hosts: localhost
  gather_facts: false
  vars:
    x: 10
    y: 15
    list: [10,20,30]

  tasks:
    - name: Check if x:{{ x }} equals y:{{ y }}
      when: x == y
      ansible.builtin.debug:
        msg:
          - "The value of x is {{ x }} and the value of y is {{ y }}"
          - "Our list contains: {{ list }}"
      
    - name: Check if x is in the list
      when: x in list
      ansible.builtin.debug:
        msg: "x is present in the list"

    
    - name: Skip
      when: false
      ansible.builtin.debug:
        msg: "Skip this"
      register: task_state

    - name: Runs when previous tasks has skipped
      when: task_state.skipped
      ansible.builtin.debug:
        msg: "Only shows when previous task has skipped"
    
    - name: Runs when previous tasks hasn't skipped
      when: not task_state.skipped
      ansible.builtin.debug:
        msg: "Only shows when previous task hasn't skipped"
      

- name: And / Or
  hosts: localhost
  gather_facts: false
  vars:
    some_list: []
    some_dict: {}

  tasks:
    - name: And
      block:
        - name: Check if some_list is a list
          when:
            - some_list is defined
            - some_list is not mapping
            - some_list is iterable
            - some_list is not string
          ansible.builtin.debug:
            msg: "some_list is a list"
        
        - name: Check if some_dict is a list
          when:
            - some_dict is defined
            - some_dict is not mapping
            - some_dict is iterable
            - some_dict is not string
          ansible.builtin.debug:
            msg: "some_dict is a list"
        
        - name: Check if some_list is a dict
          when:
            - some_list is defined
            - some_list is mapping
            - some_list is iterable
            - some_list is not string
          ansible.builtin.debug:
            msg: "some_list is a dict"
        
        - name: Check if some_dict is a dict
          when:
            - some_dict is defined
            - some_dict is mapping
            - some_dict is iterable
            - some_dict is not string
          ansible.builtin.debug:
            msg: "some_dict is a dict"

    - name: Or
      block:
        - name: Check if some_list is a list or a dict
          when:
            - some_list is defined and some_list is iterable and some_list is not string
            - some_list is not mapping or some_list is mapping
          ansible.builtin.debug:
            msg: "some_list is a list or a dict"

        - name: Check if some_dict is a list or a dict
          when: >
            (some_list is defined and some_list is iterable and some_list is not string) and
            some_list is not mapping or
            some_list is mapping
          ansible.builtin.debug:
            msg: "some_list is a list or a dict"


- name: Logical Operator
  hosts: localhost
  gather_facts: false
  vars:
    hello: true
    say_something: "{% if hello == true %} Hello Jinja {% else %} Goodbye Ansible {% endif %}"

  tasks:
    - name: Jinja2 logical operation
      ansible.builtin.debug:
        msg:
          - "{{ say_something }}"
...