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# Editing String Contents

The following functions edit, format, and align the contents of strings. Use the & operator to concatenate strings.

## Format Function

Converts a number to a string, and then formats it according to the format that you specify.

## LCase Function

Converts all uppercase letters in a string to lowercase.

## Left Function

Returns the number of leftmost characters that you specify of a string expression.

## LSet Statement

Aligns a string to the left of a string variable, or copies a variable of a user-defined type to another variable of a different user-defined type.

## LTrim Function

Removes all leading spaces at the start of a string expression.

## Mid Function, Mid Statement

Returns the specified portion of a string expression (Mid function), or replaces the portion of a string expression with another string (Mid statement).

## Right Function

Returns the rightmost "n" characters of a string expression.

## RSet Statement

Right-aligns a string within a string variable, or copies a user-defined variable type into another.

## RTrim Function

Deletes the spaces at the end of a string expression.

## Trim Function

Removes all leading and trailing spaces from a string expression.

## UCase Function

Converts lowercase characters in a string to uppercase.

## Split Function

Returns an array of substrings from a string expression.

## Join Function

Returns a string from a number of substrings in a string array.

## ConvertToURL Function

Converts a system file name to a file URL.

## ConvertFromURL Function

Converts a file URL to a system file name.