InstallShield 2015 » InstallScript Language Reference
The StrToNum function converts a string to a number, much like the C function atol(). It inspects svString, starting with the character at position 0 and continuing through the string until it reaches the end of the string or encounters a character that is not in the range "0"..."9". (The first character in the string can be a plus or minus sign.)
Then one of the following processes occurs:
| • | If all of the characters in the string are in the range "0".."9", the number represented by the string is assigned to nvVar. |
| • | If the string begins with one or more characters in the range "0".."9" but also contains one or more non-numeric characters, a number based on the characters to the left of the first non-numeric character is assigned to nvVar. For example, if szString is "-123ABC456", nvResult will be -123. |
| • | If the first character in the string is not in the range "0".."9" and is not a plus or minus sign, the function fails. |
| • | If the first character in the string is a plus or minus sign and the second character is not in the range "0".."9", the function fails. |
Syntax
StrToNum ( nvVar, szString );
Parameters
|
Parameter |
Description |
|
nvVar |
Returns the number created from the string in szString. |
|
szString |
Specifies the string to convert to a number. If the string corresponds to a number that is outside the range of allowed values for a number variable, this function gives unexpected results. |
Return Values
|
Return Value |
Description |
|
0 |
Indicates that the function successfully converted the string into a numeric value. |
|
< 0 |
Indicates that the function was unable to convert the string into a numeric value. |
See Also
InstallShield 2015 Help LibraryJune 2015 |
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