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Convert strings to uppercase


newStr = upper(str)


newStr = upper(str) converts all lowercase characters in str to the corresponding uppercase characters and leaves all other characters unchanged.


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upper('Hello, World.')
ans = 

Starting in R2017a, you can create string arrays using double quotes.

Convert a string array to contain uppercase characters.

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

newStr = upper(str)
newStr = 2x1 string array

Input Arguments

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


For character arrays, the upper function supports the character sets:

  • PC: Windows® Latin-1

  • Other: ISO® Latin-1 (ISO 8859-1)

For string arrays, the upper function supports Unicode®.

Extended Capabilities

Introduced before R2006a