The '''PUT #''' file or port statement writes data to a specific byte or record location.



{{PageSyntax}}
:: '''PUT #''filenumber&amp;'',''' [''position''][, {''holdingvariable''|''holdingarray()''}]



* File/port number is the number used in the [[OPEN]] statement. 
* The [[INTEGER]] or [[LONG]] file byte ''position'' in a [[BINARY]] file or the record ''position'' in a [[RANDOM]] file '''must be greater than zero'''. 
* The file byte or record ''position'' can be omitted if the [[PUT]] or [[GET]] is consecutive or when creating new file data sequentially. 
* The ''holding variable'' [[TYPE|type]] determines byte size and the next byte position in the file when the ''position'' is ommitted.
* The first byte or record position is 1. This may require adding one to an offset value when documentation uses that position as 0.
* Both the file ''position'' and ''holding variable''(and comma) can be omitted when using a [[FIELD]] definition.
* If a [[LEN]] = record length statement is omitted in an [[OPEN]] FOR [[RANDOM]]  statement the record size defaults to 128 bytes!
* '''Warning: Not designating a PUT position can overwrite previous file data based on the current file ''position''!'''
* When using a numeric ''holding variable'', values do NOT require conversion using [[MKI$]], [[MKL$]], [[MKS$]] or [[MKD$]].
* '''QB64''' can load [[Arrays|array]] data directly(brackets required) to a [[BINARY]] file using '''one''' PUT to a [[BINARY]] file: '''{{text|PUT #1, , array()|green}}'''


''Example 1:'' Using a [[TYPE]] record variable(Contact) to enter a new [[RANDOM]] record to a file.
{{CodeStart}} '' ''
{{Cl|TYPE}} ContactType
  first {{Cl|AS}} {{Cl|STRING}} * 10
  last {{Cl|AS}} {{Cl|STRING}} * 20
  age {{Cl|AS}} {{Cl|INTEGER}}
{{Cl|END}} {{Cl|TYPE}}
{{Cl|DIM}} Contact {{Cl|AS}} ContactType

{{Cl|INPUT}} "Enter a first name: ", Contact.first
{{Cl|INPUT}} "Enter a last name: ", Contact.last
{{Cl|INPUT}} "Enter an age: ", Contact.age

{{Cl|OPEN}} "Record.lst" {{Cl|FOR...NEXT|FOR}} {{Cl|RANDOM}} {{Cl|AS}} #1 {{Cl|LEN}} = {{Cl|LEN}}(Contact)
NumRecords% = {{Cl|LOF}}(1) \ {{Cl|LEN}}(Contact)
{{Cl|PRINT}} NumRecords%; "previous records"

{{Cl|PUT}} #1, NumRecords% + 1, Contact ' add a new record {{Cl|TYPE}} record value
{{Cl|CLOSE}} #1 '' ''
{{CodeEnd}}
: ''Note:'' The DOT record variable values were created or changed before the PUT. The record length is 32 bytes.


''Example 2:'' Placing the contents of a numerical array into a [[BINARY]] file. You may want to put the array size at the beginning too.
{{CodeStart}} '' ''
{{Cl|DIM}} {{Cl|SHARED}} array(100) {{Cl|AS}} {{Cl|INTEGER}}

{{Cl|FOR...NEXT|FOR}} i = 1 {{Cl|TO}} 100
  array(i) = i
{{Cl|NEXT}}
showme  'display array contents

{{Cl|OPEN}} "BINFILE.BIN" {{Cl|FOR...NEXT|FOR}} {{Cl|BINARY}} {{Cl|AS}} #1

{{Cl|PUT}} #1, , array()

{{Cl|ERASE}} array 'clear element values from array and display empty
showme
{{Cl|CLOSE}} #1

{{Cl|OPEN}} "BINFILE.BIN" {{Cl|FOR...NEXT|FOR}} {{Cl|BINARY}} {{Cl|AS}} #2
{{Cl|GET}} #2, , array()
{{Cl|CLOSE}} #2
showme  'display array after transfer from file

{{Cl|END}}

{{Cl|SUB}} showme
{{Cl|FOR...NEXT|FOR}} i = 1 {{Cl|TO}} 100
  {{Cl|PRINT}} array(i);
{{Cl|NEXT}}
{{Cl|PRINT}} "done"
{{Cl|END SUB}} '' ''
{{CodeEnd}}
: ''Note:'' Use empty brackets in QB64 when using [[GET]] to create an array or [[PUT]] to create a [[BINARY]] data file.


''See Example:'' [[Program ScreenShots]]


''See also:'' 
* [[GET|GET #]] 
* [[SEEK]], [[SEEK (statement)]] 
* [[PRINT (file statement)|PRINT  #]] 
* [[FIELD]] 
* [[PUT (graphics statement)]]
* [[PUT (TCP/IP statement)]]


{{PageNavigation}}
<
