Format and transform text.
✍️ 3 exercises + code challenge in this lessonUseful string methods (each returns a new string):
upper(), lower(), title(), capitalize()strip(): remove spaces at both endsreplace(old, new)split(sep) and "sep".join(list)find(), count(), startswith(), endswith()Put an f before the string and insert values with {}: f"{name} is {age}". Format numbers with {price:.2f} or {n:,}.
Mastering Python String Methods & f-strings helps you write clean and reliable Python code. Follow standard conventions, test edge cases, and keep logic simple. Try running the code example below and complete the exercises to build confidence.
text = " learn python at codesintech "
clean = text.strip()
print(clean.title())
print(clean.upper())
print(clean.replace("python", "SQL"))
print(clean.split(" "))
print("-".join(["2026", "10", "22"]))
print(clean.count("o"), clean.startswith("learn"))
name, price, users = "Course", 4999.5, 1250000
print(f"{name} costs Rs {price:.2f} and has {users:,} users")Check what you learned in “Python String Methods & f-strings”.
Create an f-string.
"Hello {name}"
Which method splits "a,b,c" into a list?
Use an f-string to print "Ali is 30 years old".
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