StringLength¶

Status: Stable

documented, exercised by the test suite and/or worked examples, with no known limitations recorded.

Description¶

StringLength["string"]
    Gives the number of characters in a string.

Examples¶

No verified examples yet for this function.

Implementation notes¶

builtin_stringlength checks for a single EXPR_STRING argument and returns expr_new_integer((int64_t)strlen(arg->data.string)) — a byte count, not a codepoint count. Non-string arguments leave the call unevaluated (NULL). ATTR_LISTABLE | ATTR_PROTECTED, so it threads element-wise over a list of strings automatically.

Attributes: Listable, Protected.

Implementation status¶

Stable — documented, exercised by the test suite and/or worked examples, with no known limitations recorded.

References¶

Source: src/picostrings.c
Specification: docs/spec/builtins/string-operations.md

Notes & additional examples¶

Worked examples¶

In[1]:= StringLength["hello"]
Out[1]= 5

In[2]:= StringLength["Mathilda"]
Out[2]= 8

In[3]:= StringLength[""]
Out[3]= 0

Notes¶

StringLength returns the number of characters in a string; the empty string has length 0.