x==y is same as x equal to y:
x==y
Integer x = 5; Integer y = 5; System.debug(x==y);
x>y
Integer x = 5; Integer y = 2; System.debug(x>y);
x<y
Integer x = 1; Integer y = 2; System.debug(x<y);
x>=y
Integer x = 5; Integer y = 2; System.debug(x>=y);
x<=y
Integer x = 0; Integer y = 0; System.debug(x<=y);
x!=y
Integer x = 5; Integer y = 5; System.debug(x!=y);