For loop

Use a for loop when you know how many times the loop should run.

A for loop is used for iterating over a sequence data types such as list, tuple, string or dictionary. If you are confused on why is a string considered as sequence? it is because a string is also a character array.

weekdays = ["monday", "tuesday", "wednesday", "thurday", "friday"]
for w in weekdays:
  print(w)

Yeah, you guessed the output right.

monday
tuesday
wednesday
thursday
friday

Conditions

In the above weekdays list, print only when weekday is Wednesday.

weekdays = ["monday", "tuesday", "wednesday", "thurday", "friday"]
for w in weekdays:
    if w == "wednesday":
        print(w)

Break

A break statement can be used to control the loop iterations. In a nutshell, break breaks the loop execution when a condition is matched.

weekdays = ["monday", "tuesday", "wednesday", "thurday", "friday"]
for w in weekdays:
    print(w)
    if w == "wednesday":
        break

Can you guess the output?

Yeah, the output is:

monday
tuesday
wednesday

Let me bring the print statement in the above example after the if condition.

weekdays = ["monday", "tuesday", "wednesday", "thurday", "friday"]
for w in weekdays:
    if w == "wednesday":
        break
    print(w)

Can you guess the output now? give it a try.

continue

A continue statement can be used to skip an Iteration of a loop. In a nutshell, continue skips the current iteration and moves to the next iteration.

weekdays = ["monday", "tuesday", "wednesday", "thurday", "friday"]
for w in weekdays:
    if w == "wednesday":
        continue
    print(w)

output:

monday
tuesday
thursday
friday