How to Change the first letter of a string to capital case and the rest to lowercase

impropermsg = input('Enter the sentence : \n', 's');
function propermsg = changemsg(impropermsg)
propermsg = strcat(upper(impropermsg(1)),lower(impropermsg(2:end)));
end
% The user can input but nothing happens

[Walter Roberson]

You are missing the step of invoking the function. You get the input and you define the function but not call the function on the input

[Les Beckham]

You created a function that looks like it will do what you want but (at least in the code you posted) you never called the function.

You could just eliminate the 2nd and 4th lines of this code and you will have a simple two line script that does what you want (with the answer being in the propermsg string). If you want the result to be displayed, just take the semicolon off of the end of the propermsg = ... line.

[sydney salvador]

Thank you for the feedback, I will remember the structure next time

Answer 1

[Image Analyst]

Make a script called something like test.m, and put this into it:

impropermsg = input('Enter the sentence : \n', 's');
% Now call the function:
propermsg = changemsg(impropermsg);
fprintf('The result is "%s"\n', propermsg);

function propermsg = changemsg(impropermsg)
propermsg = strcat(upper(impropermsg(1)),lower(impropermsg(2:end)));
end

Answer 2

[mahmoud abdelaal]

word='si'

word = 'si'

new=replace(word,word(1),upper(word(1)))

new = 'Si'

[Image Analyst]

That doesn't replace the rest with lower case like requested:

word='siUPPERCASE'

word = 'siUPPERCASE'

new=replace(word,word(1),upper(word(1)))

new = 'SiUPPERCASE'

You'd need to add this line:

new = replace(new, word(2:end), lower(word(2:end)))

new = 'Siuppercase'

Answer 3

[Toshiaki Takeuchi]

Using Pattern https://www.mathworks.com/help/matlab/ref/pattern.html

str = "test";
pat = lineBoundary("start")+lettersPattern(1);
new_str = replace(str,pat,(upper(extract(str,pat))))

new_str = "Test"

[Walter Roberson]

This misses on the "convert the rest to lowercase"