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LowerCaseQ
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LowerCaseQ

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LowerCaseQ[string]

yields True if all the characters in the string are lowercase letters, and yields False otherwise.

Details

  • LowerCaseQ treats both ordinary and special characters.

Examples

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Basic Examples  (1)Summary of the most common use cases

Test whether a character is a lowercase letter:

In[1]:=1
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https://wolfram.com/xid/0b0lnaal78z-l7n
Out[1]=1
In[2]:=2
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https://wolfram.com/xid/0b0lnaal78z-vo7
Out[2]=2

Scope  (4)Survey of the scope of standard use cases

Test whether all characters in a string are lowercase letters:

In[1]:=1
✖
https://wolfram.com/xid/0b0lnaal78z-htc
Out[1]=1

Accented letters are still treated as letters:

In[1]:=1
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https://wolfram.com/xid/0b0lnaal78z-ti8
Out[1]=1

Gothic letters are treated as letters:

In[1]:=1
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https://wolfram.com/xid/0b0lnaal78z-wsi
Out[1]=1

Greek letters are treated as letters:

In[1]:=1
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https://wolfram.com/xid/0b0lnaal78z-bj9
Out[1]=1

Properties & Relations  (2)Properties of the function, and connections to other functions

All characters treated as lowercase letters:

In[1]:=1
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https://wolfram.com/xid/0b0lnaal78z-vkt
Out[1]=1

No letters are both uppercase and lowercase:

In[1]:=1
✖
https://wolfram.com/xid/0b0lnaal78z-h75
Out[1]=1

Possible Issues  (1)Common pitfalls and unexpected behavior

Some letters are neither uppercase nor lowercase:

In[1]:=1
✖
https://wolfram.com/xid/0b0lnaal78z-dty
Out[1]=1
In[2]:=2
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https://wolfram.com/xid/0b0lnaal78z-vdy
Out[2]=2

Neat Examples  (1)Surprising or curious use cases

Find all letters that are neither uppercase nor lowercase:

In[1]:=1
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https://wolfram.com/xid/0b0lnaal78z-dxs
Out[1]=1
Wolfram Research (1991), LowerCaseQ, Wolfram Language function, https://reference.wolfram.com/language/ref/LowerCaseQ.html (updated 1996).
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Wolfram Research (1991), LowerCaseQ, Wolfram Language function, https://reference.wolfram.com/language/ref/LowerCaseQ.html (updated 1996).

Text

Wolfram Research (1991), LowerCaseQ, Wolfram Language function, https://reference.wolfram.com/language/ref/LowerCaseQ.html (updated 1996).

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Wolfram Research (1991), LowerCaseQ, Wolfram Language function, https://reference.wolfram.com/language/ref/LowerCaseQ.html (updated 1996).

CMS

Wolfram Language. 1991. "LowerCaseQ." Wolfram Language & System Documentation Center. Wolfram Research. Last Modified 1996. https://reference.wolfram.com/language/ref/LowerCaseQ.html.

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Wolfram Language. 1991. "LowerCaseQ." Wolfram Language & System Documentation Center. Wolfram Research. Last Modified 1996. https://reference.wolfram.com/language/ref/LowerCaseQ.html.

APA

Wolfram Language. (1991). LowerCaseQ. Wolfram Language & System Documentation Center. Retrieved from https://reference.wolfram.com/language/ref/LowerCaseQ.html

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Wolfram Language. (1991). LowerCaseQ. Wolfram Language & System Documentation Center. Retrieved from https://reference.wolfram.com/language/ref/LowerCaseQ.html

BibTeX

@misc{reference.wolfram_2025_lowercaseq, author="Wolfram Research", title="{LowerCaseQ}", year="1996", howpublished="\url{https://reference.wolfram.com/language/ref/LowerCaseQ.html}", note=[Accessed: 25-March-2025 ]}

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@misc{reference.wolfram_2025_lowercaseq, author="Wolfram Research", title="{LowerCaseQ}", year="1996", howpublished="\url{https://reference.wolfram.com/language/ref/LowerCaseQ.html}", note=[Accessed: 25-March-2025 ]}

BibLaTeX

@online{reference.wolfram_2025_lowercaseq, organization={Wolfram Research}, title={LowerCaseQ}, year={1996}, url={https://reference.wolfram.com/language/ref/LowerCaseQ.html}, note=[Accessed: 25-March-2025 ]}

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@online{reference.wolfram_2025_lowercaseq, organization={Wolfram Research}, title={LowerCaseQ}, year={1996}, url={https://reference.wolfram.com/language/ref/LowerCaseQ.html}, note=[Accessed: 25-March-2025 ]}