Problem 568. Number of 1s in a binary string

Created by Srivardhini

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Find the number of 1s in the given binary string. Example. If the input string is '1100101', the output is 4. If the input string is '0000', the output is 0

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5367 Solutions
1930 Solvers

Last Solution submitted on Jul 10, 2020

Last 200 Solutions

Problem Comments

2 Comments

2 Comments

Ryan McBurney on 30 Aug 2019

Something weird is happening

When I submit the size of my code is -1 and it fails the test suite when it seems to work fine in MATLAB desktop.

Fakhteh Ghalami on 9 Nov 2019

would you please let me know why
sum(x) creates error?

Solution Comments

Solution 2677466

1 Comment

1 Comment

evan muas 9 hours and 49 minutes ago

used y=y+str2double(x(i)) instead of y=y+str2double(x(i)) and it worked just fine

Solution 2586394

1 Comment

1 Comment

Piero Cimule on 20 Jun 2020 at 0:03

y=0;
for index=1:length(x)
y = y + str2num(x(index));
end

Solution 1882740

2 Comments

2 Comments

Sarah Walls on 24 Jul 2019

Why doesn't this solution work? Works just fine in my desktop program...

Marius Mueller on 17 Mar 2020

Because you compare a char Array to a double. Try (x=='1').

Problem Recent Solvers1930

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binary sum

Problem 568. Number of 1s in a binary string

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Last 200 Solutions

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Problem Recent Solvers1930

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Problem 568. Number of 1s in a binary string

Solution Stats

Last 200 Solutions

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Solution Comments

Problem Recent Solvers1930

Suggested Problems

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