1.What is Append function?
Append function is used to add a item at the end of the sequence if the condition is True.

Example1

subjects = ['Maths','Science','Physics']subjects.append('Chemistry')print(subjects)

Explanation:
Statement 1:
subjects = ['Maths','Science','Physics']
Statement 2:
append functions is being used in Statement 2 So, 'Chemistry' will be added at the end of the sequence.
Final Output:
['Maths', 'Science', 'Physics', 'Chemistry']

Example 2

list1=['Mathematics', 'AI', 'Science','Political Science']list2=[]for i in list1: if 'a' in i:    list2.append(i)print(list2)

Explanation:
Iteration1:
"a" in 'Mathematics' , condition becomes True and it will be added at the end of list2.
Iteration1:
"a" in 'AI' , condition becomes FALSE and it will not be added in sequence.

Final output
['Mathematics', 'Political Science']