Ansible: Stop a loop when the conditional is true the first time - ansible

Question

Is there a way to stop a loop when the conditional is true the first time? In the example below, I want the value of student to be betty. But it currently will be set to brad. If I add "and student is undefined" to the when condition then it will work, but is there a better way? Thanks!
---
- hosts: localhost
vars:
marks:
- name: bob
grade: a
- name: betty
grade: c
- name: jenny
grade: d
- name: brad
grade: c
tasks:
- set_fact:
student: '{{ item.name }}'
loop: '{{ marks }}'
when: item.grade == 'c'
- debug:
var: student

Answer 1

Given the list
marks:
- {grade: a, name: bob}
- {grade: c, name: betty}
- {grade: d, name: jenny}
- {grade: c, name: brad}
Q: " ... when the conditional is true the first time ... I want the value of student to be betty."
A: Use filters instead of a loop. There are more options:
Select the first item that meets the condition
student: "{{ marks|
selectattr('grade', 'eq', 'c')|
map(attribute='name')|
first }}"
gives
student: betty
The filter json_query gives the same result
student: "{{ marks|
json_query('[?grade==`c`].name')|
first }}"
Example of how to find when the conditional is true for the first time in a loop
For example, let's simulate the use case of iterating a command until it succeeds. The task below iterates the list [1,2,3,4,5] and the command test the item is greater than 3. The loop will skip the rest of the list after the condition is met
- command: '[ "{{ item }}" -gt "3" ]'
loop: "{{ range(1, 5 + 1)|list }}"
register: result
ignore_errors: true
when: not condition
vars:
condition: "{{ (result|default({'rc': 1})).rc == 0 }}"
- debug:
msg: "{{ result.results|
json_query('[?rc==`0`].item')|
first }}"
gives (selected relevant part)
failed: [localhost] (item=3) => changed=true
...
item: 3
msg: non-zero return code
rc: 1
...
changed: [localhost] => (item=4)
skipping: [localhost] => (item=5)
...ignoring
TASK [debug] ****
ok: [localhost] =>
msg: '4'
See details in the thread Looping a task until it succeeds.