Definition of string operations

operations that are performed on character string data. Here are some examples from Java, where A represents the string "GEORGE" and B represents "WASHINGTON"

1. Compare two strings to see if they are the same. For example,A.equals(B)
   (in other programming languages, A==B or A=B) will be false.
2. Determine if one string comes before the other in alphabetical order. For example,
   A. compareTo(B)<=0
   will be true (because GEORGE comes before WASHINGTON). In other programming languages this is expressed as Asee Unicode).
3. Join strings together (concatenation). For example,
   A+" "+B
   is
   "GEORGE WASHINGTON"
   created by joining A, a blank, and B.
4. Calculate the length of a string. For example, A.length () is 6.
5. Select specified characters from any position in string. For example,
   B.substring(4,7)
   is the string "ING". The 4 means to start at character 4, which is the character I since the first character (W) is character 0. The 7 means to include all characters up to (but not including) character 7 (which is T).
6. Determine if one string is contained in another string, and if so, at what position it starts. For example,
   A.indexOf("OR")
   is 2, since OR starts at character 2 of GEORGE (recall that the first character is character 0). However,
   B.indexOf("AND")
   is -1 since the string AND does not occur within the string WASHINGTON.
7. Determine the Unicode value for an individual character. For example, if C is a character variable, then (short) C
   will give its Unicode value. Here short is a type of integer variable.
8. Determine the character associated with a given Unicode value. For example, if K is an integer variable, then
   (char)K
   is the character associated with that value.
9. Determine the numerical value of a string that represents a number. Here are two example for integers and strings):
   String x="234";
   int z=Integer.parseInt(x);
   String x2="234.567";
   double z2=(Double.valueOf(x2)).doubleValue();
   Note the capitalization needs to be exactly as shown.
10. Convert a numeric value into a string. For example,
    String x=String.valueOf(567);
    will cause x to become the string "567".