Python · Theory

startswith(str,beg=0,end=len(str))

Theory

242/268

startswith(str,beg=0,end=len(str))

startswith is a string helper. You call it on text like "Asha" or "banana". It gives a new string (or a number/True-False). The old string does not change unless you assign the result back.

startswith(str,beg=0,end=len(str)) — output: True.

Fresher trap: writing s.startswith() and expecting s to update. Strings are immutable. Write s = s.startswith(...) if you need the new value (when it returns a string).

Exam tip

Call startswith on one real word and say what prints.

Example

# startswith(str,beg=0,end=len(str))
print("Asha".startswith("As"))

startswith(str,beg=0,end=len(str)) — output: True.

Short notes

Defstartswith works on str.
Rulestartswith usually returns a new string.
Trapstartswith does not change the original string in place.

Python · Theory

startswith(str,beg=0,end=len(str))

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Theory

242/268

startswith(str,beg=0,end=len(str))

startswith is a string helper. You call it on text like "Asha" or "banana". It gives a new string (or a number/True-False). The old string does not change unless you assign the result back.

startswith(str,beg=0,end=len(str)) — output: True.

Fresher trap: writing s.startswith() and expecting s to update. Strings are immutable. Write s = s.startswith(...) if you need the new value (when it returns a string).

Exam tip

Call startswith on one real word and say what prints.

Example

# startswith(str,beg=0,end=len(str))
print("Asha".startswith("As"))

startswith(str,beg=0,end=len(str)) — output: True.

Short notes

Defstartswith works on str.
Rulestartswith usually returns a new string.
Trapstartswith does not change the original string in place.

startswith(str,beg=0,end=len(str))

Example

Short notes

Questions

startswith(str,beg=0,end=len(str))

Example

Short notes

Questions