checking and generating fix length value

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Raza
Raza 2014-12-19
编辑： Stephen23 2014-12-19
i have coed which gives result by summing all the numbers but i need the sum must be of length of 4 numbers
example i add 16 different numbers and sum = 834
i need this 834 in 0843 form???
  2 个评论
Stephen23
Stephen23 2014-12-19
Are you converting the numeric to string or displaying the numbers somehow?
The numeric formats used to store numbers on computers don't (usually) distinguish between 0834 and 834, so the question does not really make sense unless you are converting the number to a string or displaying it in some other way. Please edit your question to indicate what exactly what you are trying to achieve.
Raza
Raza 2014-12-19
yes i am converting numeric to string.

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采纳的回答

Stephen23
Stephen23 2014-12-19
编辑：Stephen23 2014-12-19
Based on your answer to my question above, then you can use sprintf to exactly control with string length and leading zeros:
sprintf('%04d',834)

更多回答（1 个）

Azzi Abdelmalek
Azzi Abdelmalek 2014-12-19
a=83
b=num2str(a)
out=[repmat('0',1,4-numel(b)) b]

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