Most loops you will ever write are one of a handful of patterns. Learn them as shapes and you will spot them everywhere.

Total: add each item to a running total.

total = 0
for n in range(1, 101):
    total += n
print(total)

Count: add 1 when an item matches.

count = 0
for n in range(1, 101):
    if n % 7 == 0:
        count += 1
print(count, "multiples of 7")

Biggest so far: start with the first item and replace it whenever you find something bigger.

word = "keyboard"
biggest = word[0]
for ch in word:
    if ch > biggest:
        biggest = ch
print("Last letter alphabetically:", biggest)

Find: stop as soon as you find what you are looking for, and remember whether you did with a flag, a variable that holds True or False.

found = False
for n in range(2, 50):
    if n * n > 200:
        found = True
        break
print(found, n)