Can't figure out these errors

[technologythatlasts]

What's wrong with this code?

   public class MoreMethods {
      public static void main(String[] args) {
      
      //12 specifies the highest exponent for i
         printPowersOf2(12);
         System.out.println();
         System.out.println();
         printWordNumTimes("errors", 4);
         System.out.println();
         System.out.println(doubleIt(5));
         System.out.println();
         System.out.println(sum100(2, 4));
         System.out.println();
         printNumbers(15);
         System.out.println();
         System.out.println();
         printmoreNumbers();
         System.out.println();
         System.out.println();
         vertical("hey now");
         System.out.println();
         System.out.print(countQuarters(130) + " total quarter(s) returned");
      
      }
   
      public static void printPowersOf2(int a) {
         for ( int i = 0; i < a; i++ ) {
            double x = Math.pow(2, i);
            System.out.print(x + " ");
         }
      }
   
      public static void printWordNumTimes(String word, int x) {
         for ( int i = 0; i < x; i++ ) {
            System.out.println(word);
         }
      }
   
      public static int sumab(int a, int b) {
         for ( int i = a; i < b; i++ )
            int c = a + i;
         return c;
      }
   	
      public static int doubleIt(int a) {
         return a*2;
      }
   
      public static void printNumbers(int x) {
         for ( int i = 1; i <= x; i++ ) {
            System.out.print("[" + i + "]" + " ");
         }
      }
   
      public static void printmoreNumbers() {
         for ( int i = 1; i<= 10; i++ ) {
            System.out.print("[" + i + "]" + " ");
         }
      }
   
      public static void vertical(String verticalword) {
         for ( int a = 0; a < verticalword.length(); a++ ) {
            System.out.println(verticalword.charAt(a));
         }
      }
   
      public static int countQuarters(int x) {
         return (x%100)/25;
      }
   }

I get the following errors:
MoreMethods.java:41: '.class' expected
int c = a + i;
^
MoreMethods.java:41: not a statement
int c = a + i;
^
MoreMethods.java:41: illegal start of expression
int c = a + i;
^
MoreMethods.java:41: ';' expected
int c = a + i;
^
MoreMethods.java:41: not a statement
int c = a + i;

Thanks for your help!

[SurfMan]

- sum100 is not an existing method
- you have no curly braces after the for-loop for (int i = a; i < b; i++) for Java executes the next line in a loop, but it does nothing but assign a value over and over again. Add curly braces. (And move int c out of that scope.)

If you get that braces problem a lot, get used to typing

for ( ; ; ) { 
}

and then fill in the blanks.

Last, use [ code] and [/ code] tags to format you code. I can't read your code like that. (Which also makes me eager to skip this question...)

[technologythatlasts]

Thanks a lot! It has fixed all but one error. Here is the last remaining error:

MoreMethods.java:43: cannot find symbol
symbol : variable c
location: class MoreMethods
return c;
^

Here is the corrected code with the proper code tags; thanks for informing me about that.

   public class MoreMethods {
      public static void main(String[] args) {
      
      //12 specifies the highest exponent for i
         printPowersOf2(12);
         System.out.println();
         System.out.println();
         printWordNumTimes("errors", 4);
         System.out.println();
         System.out.println(doubleIt(5));
         System.out.println();
         System.out.println(sumab(2, 4));
         System.out.println();
         printNumbers(15);
         System.out.println();
         System.out.println();
         printmoreNumbers();
         System.out.println();
         System.out.println();
         vertical("hey now");
         System.out.println();
         System.out.print(countQuarters(130) + " total quarter(s) returned");
      
      }
   
      public static void printPowersOf2(int a) {
         for ( int i = 0; i < a; i++ ) {
            double x = Math.pow(2, i);
            System.out.print(x + " ");
         }
      }
   
      public static void printWordNumTimes(String word, int x) {
         for ( int i = 0; i < x; i++ ) {
            System.out.println(word);
         }
      }
   
      public static int sumab(int a, int b) {
         for ( int i = a; i < b; i++ ) {
            int c = a + i;
			}
         return c;
      }
   	
      public static int doubleIt(int a) {
         return a*2;
      }
   
      public static void printNumbers(int x) {
         for ( int i = 1; i <= x; i++ ) {
            System.out.print("[" + i + "]" + " ");
         }
      }
   
      public static void printmoreNumbers() {
         for ( int i = 1; i<= 10; i++ ) {
            System.out.print("[" + i + "]" + " ");
         }
      }
   
      public static void vertical(String verticalword) {
         for ( int a = 0; a < verticalword.length(); a++ ) {
            System.out.println(verticalword.charAt(a));
         }
      }
   
      public static int countQuarters(int x) {
         return (x%100)/25;
      }
   }

Again, I appreciate your help.

[Tolls]

'c' is declared in the for-loop, so is not accessible outside of that loop.
You need to declare 'c' outside of the loop.

[technologythatlasts]

'c' is declared in the for-loop, so is not accessible outside of that loop.
You need to declare 'c' outside of the loop.

Ah okay, thanks for that. I managed to fix all the errors now.