Here is my if-else statement:
public static void main(String[] args) { Scanner input = new Scanner (System.in); int number; System.out.println("Enter Integer: "); number = input.nextInt(); if (number % 7 == 0) { System.out.println(number + " is divisible by 7"); } else { System.out.println(number + " isn't divisible by 7"); } } Never mind the switch - you don't need either.
You can make it into one statement:
System.out.println(number + " is" + (number % 7 == 0 ? "" : "n't") + " divisible by 7"); 
number = input.nextInt(); switch(number % 7) { case 0: System.out.println(number + " is divisible by 7"); break; default: System.out.println(number + " isn't divisible by 7"); } number = input.nextInt(); a = number % 7 switch (a) { case 0: System.out.println(number + " is divisible by 7"); break; default: System.out.println(number + " isn't divisible by 7"); break; } Check this out:
switch (number % 7) { case 0: System.out.println(number + " is divisible by 7"); break; default: System.out.println(number + " isn't divisible by 7"); } OR
switch (number % 7) { case 0: System.out.println(number + " is divisible by 7"); break; case 1: // Fall through case 2: case 3: case 4: case 5: case 6: System.out.println(number + " isn't divisible by 7"); } Try like this;
Scanner input = new Scanner (System.in); int number; System.out.println("Enter Integer: "); number = input.nextInt(); int tempNumber = number % 7; switch(tempNumber) { case 0: System.out.println(number + " is divisible by 7"); break; default : System.out.println(number + " isn't divisible by 7"); } 