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Convert string to lowercase


newTxt = lower(txt)



newTxt = lower(txt) converts all uppercase characters in txt to the corresponding lowercase characters and leaves all other characters unchanged.


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txt = 'Hello, World.';
newTxt = lower(txt)
newTxt = 
'hello, world.'

Starting in R2017a, you can create string arrays using double quotes instead of the string function.

Convert a string array to contain lowercase characters.

txt = ["The SOONER,";"the BETTER."]
txt = 2x1 string array
    "The SOONER,"
    "the BETTER."

newTxt = lower(txt)
newTxt = 2x1 string array
    "the sooner,"
    "the better."

Text processing functions, such as strfind and regexp, accept string arrays as inputs. Other functions, such as addpath, do not.

Input Arguments

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Input array, specified as a string array, character array, or cell array of character vectors.


Data Types: string | char | cell


For character arrays, the lower function supports only the character sets:

  • PC: Windows® Latin-1

  • Other: ISO® Latin-1 (ISO 8859-1)

For string arrays, the lower function supports Unicode®.

Extended Capabilities

Introduced before R2006a

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