most significant figure for 1234 in matlab in matlab

main.m
function numSigFig = sigfig(num)
    % Convert the number to a string and remove any leading or trailing zeros
    numStr = strtrim(num2str(num, "%g"));
  
    % Check if the number is in scientific notation
    if contains(numStr, "e")
        % If the number is in scientific notation, fetch the exponent
        [~, exponent] = strtok(numStr, "e");
        exponent = str2double(exponent(2:end));
        
        % Remove the scientific notation to count the significant figures
        numStr = strtok(numStr, "e");
    else
        exponent = 0;
    end
    
    % Remove the decimal point and any commas from the string
    numStr = strrep(numStr, ".", "");
    numStr = strrep(numStr, ",", "");
    
    % Count the number of significant figures
    numSigFig = sum(numStr ~= "0");
    
    % Adjust the number of significant figures based on the exponent
    numSigFig = numSigFig + exponent;
end
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main.m
num = 1234;
mostSigFig = sigfig(num);
disp("The most significant figure of " + num + " is " + mostSigFig);
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main.m
The most significant figure of 1234 is 4
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