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Diffstat (limited to 'doc/language/function/cpsc-function-is_num.7.md')
| -rw-r--r-- | doc/language/function/cpsc-function-is_num.7.md | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/doc/language/function/cpsc-function-is_num.7.md b/doc/language/function/cpsc-function-is_num.7.md index efb5f1a..3b9641d 100644 --- a/doc/language/function/cpsc-function-is_num.7.md +++ b/doc/language/function/cpsc-function-is_num.7.md @@ -14,7 +14,7 @@ IS_NUM(text : STRING) RETURNS BOOLEAN Provided by the standard string library, loaded and linked by default. -Return true for a nonempty string fully consumed by the runtime's numeric conversion. Leading whitespace is accepted; trailing whitespace or other trailing text is rejected. +Return true exactly when STR_TO_NUM would succeed: a nonempty string fully consumed by `strtod`, with a value inside the REAL range. Leading whitespace, NaN, inf and hexadecimal forms are accepted; trailing whitespace, trailing text, embedded NUL bytes and overflowing values such as `1e999` are rejected. Underflow to zero or a denormal is accepted. # EXAMPLE |