In Powershell what is the idiomatic way of converting a string to an int

Question

The only method I have found is a direct cast    gt   numberAsString    10   gt   int  numberAsString 10   Is this the standard approach in Powershell  Is it expected that a test will be done before to ensure that the conversion will succeed and if so how

User · Answer

You can use the -as operator  If casting succeed you get back a number    numberAsString -as  int

User · Answer

For me  numberAsString -as  int  of  Shay Levy is the best practice  I also use  type   Parse      or  type   TryParse       But  depending on what you need you can just put a string containing a number on the right of an arithmetic operator with a int on the left the result will be an Int32   PS  gt   b    10  PS  gt   a   0    b PS  gt   a gettype    IsPublic IsSerial Name                                     BaseType -------- -------- ----                                     -------- True     True     Int32                                    System ValueType   You can use Exception  try parse  to behave in case of Problem

User · Answer

I d probably do something like that     int   Parse  35     But I m not really a Powershell guy  It uses the static Parse method from System Int32  It should throw an exception if the string can t be parsed

User · Answer

A quick true false test of whether it will cast to  int    bool   var -as  int  -is  int

User · Answer

source    number35    number  null   result   foreach     in  source ToCharArray     digit  0123456789  IndexOf     0  if  digit -ne -1   number         int32  number   Just feed it digits and it wil convert to an Int32

User · Answer

Building up on Shavy Levy answer    bool   var -as  int     Because  null is evaluated to false  in bool   this statement Will give you true or false depending if the casting succeeds or not

User · Answer

Using  net   int  b    null  used after as refence  b 0  int32   TryParse  a    ref  b     test if is possible to cast and put parsed value in reference variable True  b 10  b gettype    IsPublic IsSerial Name                                     BaseType -------- -------- ----                                     -------- True     True     Int32                                    System ValueType   note this  powershell coercing feature    a    10   a   1  second value is evaluated as  string  101   11    a   second value is evaluated as  int  21

[powershell] In Powershell what is the idiomatic way of converting a string to an int?

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