Python · Theory

Python Strings

Theory

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Python Strings

A string is text — an ordered row of characters. "Asha" or 'Asha'. Multi-line with triple quotes. Index from 0: s[0] is A. s[-1] is the last letter. Slice s[1:3] is sh. Concatenate with +. Repeat with *. "sh" in "Asha" is True.

Strings cannot change in place. s[0] = "B" → TypeError. Methods return a new string. f"Hi {name}" inserts values. That immutability word is what interviews want. Then one slice and one f-string.

Python Strings — output — A, Ash, Hi Asha. Slice end is exclusive. String itself did not change.

Exam tip

Immutability + slice + f-string.

Example

# Strings
name = "Asha"
print(name[0])
print(name[0:3])
print(f"Hi {name}")

Python Strings — output: A, Ash, Hi Asha. Slice end is exclusive. String itself did not change.

Short notes

DefText sequence. Immutable.
RuleIndex / slice. f-strings.
Traps[0] = "H" → TypeError.

Python · Theory

Python Strings

← All stacks

Theory

17/268

Python Strings

Strings cannot change in place. s[0] = "B" → TypeError. Methods return a new string. f"Hi {name}" inserts values. That immutability word is what interviews want. Then one slice and one f-string.

Python Strings — output — A, Ash, Hi Asha. Slice end is exclusive. String itself did not change.

Exam tip

Immutability + slice + f-string.

Example

# Strings
name = "Asha"
print(name[0])
print(name[0:3])
print(f"Hi {name}")

Python Strings — output: A, Ash, Hi Asha. Slice end is exclusive. String itself did not change.

Short notes

DefText sequence. Immutable.
RuleIndex / slice. f-strings.
Traps[0] = "H" → TypeError.

Python Strings

Example

Short notes

Questions

Python Strings

Example

Short notes

Questions