Replace and Substitute functions in Power Apps

Replace a portion of a string of text with another string.

Description

The Replace function identifies the text to replace by starting position and length.

The Substitute function identifies the text to replace by matching a string. If more than one match is found, you can replace all of them or specify one to replace.

If you pass a single string, the return value is the modified string. If you pass a single-column table that contains strings, the return value is a single-column table of modified strings. If you have a multi-column table, you can shape it into a single-column table, as working with tables describes.

Syntax

Replace( String, StartingPosition, NumberOfCharacters, NewString )

  • String - Required. The string to operate on.
  • StartingPosition - Required. Character position to start the replacement. The first character of String is at position 1.
  • NumberOfCharacters - Required. The number of characters to replace in String.
  • NewString - Required. The replacement string. The number of characters in this argument can differ from the NumberOfCharacters argument.

Substitute( String, OldString, NewString [, InstanceNumber ] )

  • String - Required. The string to operate on.
  • OldString - Required. The string to replace.
  • NewString - Required. The replacement string. OldString and NewString can have different lengths.
  • InstanceNumber - Optional. Use this argument to specify which instance of OldString to replace if String contains more than one instance. If you don't specify this argument, all instances will be replaced.

Replace( SingleColumnTable, StartingPosition, NumberOfCharacters, NewString )

  • SingleColumnTable - Required. A single-column table of strings to operate on.
  • StartingPosition - Required. Character position to start the replacement. The first character of each string in the table is at position 1.
  • NumberOfCharacters - Required. The number of characters to replace in each string.
  • NewString - Required. The replacement string. The number of characters in this argument can differ from the NumberOfCharacters argument.

Substitute( SingleColumnTable, OldString, NewString [, InstanceNumber ] )

  • SingleColumnTable - Required. A single-column table of strings to operate on.
  • OldString - Required. The string to replace.
  • NewString - Required. The replacement string. OldString and NewString can have different lengths.
  • InstanceNumber - Optional. Use this argument to specify which instance of OldString to replace if String contains more than one instance. If you don't specify this argument, all instances will be replaced.

Examples

Formula Description Result
Replace( "abcdefghijk", 6, 5, "*" ) Replaces five characters in "abcdefghijk" with a single "*" character, starting with the sixth character ("f"). "abcde*k"
Replace( "2019", 3, 2, "20" ) Replaces the last two characters of "2019" with "20". "2020"
Replace( "123456", 1, 3, "_" ) Replaces the first three characters of "123456" with a single "_" character. "_456"
Substitute( "Sales Data", "Sales", "Cost" ) Substitutes the string "Cost" for "Sales". "Cost Data"
Substitute( "Quarter 1, 2018", "1", "2", 1 ) Substitutes only the first instance of "1" with "2" because the fourth argument (InstanceNumber) is provided with a 1. "Quarter 2, 2018"
Substitute( "Quarter 1, 2011", "1", "2", 3 ) Substitutes only the third instance of "1" with "2" because the fourth argument (InstanceNumber) is provided with a 3. "Quarter 1, 2012"
Substitute( "Quarter 1, 2011", "1", "2" ) Substitutes all instances of "1" with "2" because the fourth argument (InstanceNumber) isn't provided. "Quarter 2, 2022"
Replace(
[ "Quarter 1, 2018",
"Quarter 2, 2011",
"Quarter 4, 2019" ],
9, 1, "3" )
Replaces the ninth character in each record of the single-column table with "3". [ "Quarter 3, 2018",
"Quarter 3, 2011",
"Quarter 3, 2019" ]
Substitute(
[ "Qtr 1, 2018",
"Quarter 1, 2011",
"Q1, 2019" ],
"1", "3", 1 )
Because the fourth argument (InstanceNumber) is provided with a value of 1, substitutes only the first instance of "1" in each record of the single-column table with "3". [ "Qtr 3, 2018",
"Quarter 3, 2011",
"Q3, 2019" ]
Substitute(
[ "Qtr 1, 2018",
"Quarter 1, 2011",
"Q1, 2019" ],
"1", "3" )
Because the fourth argument (InstanceNumber) isn't provided, substitutes all instances of "1" in each record of the single-column table with "3". [ "Qtr 3, 2038",
"Quarter 3, 2033",
"Q3, 2039" ]