int a=25:
for (double i=1;i<=a;i++)
{
int b=5*i;
boolean value= b==a;
System.out.println(value);
}
This method is true when i=5 but false otherwise. So the value can be true at i=5 but my program will print for me : false-false-false-false-TRUE-false-false-false... how can I make this program to print just TRUE for me. PS: I know that false or false or TRUE or false = True.. but how can I use it in the for loop?
Maybe this?
int a=25;
for (double i=1;i<=a;i++) {
int b = 5 * (int)i; // you must cast "i" in order for this to compile
boolean value = b == a; // you probably wanted "b == a" not "b == i"
if (value)
System.out.println("true");
}
i.e. we print "true" only if value is true.
To stop the loop when value becomes true, we can use a break statement:
int a=25;
for (double i=1;i<=a;i++) {
int b = 5 * (int)i;
boolean value = b == a;
if (value) {
System.out.println("true");
break;
}
}
Like this:
int a=25,b:
boolean value;
for (double i=1;i<=a;i++) {
b=5*i;
value = (b==i);
if (value) {
System.out.println(value);
}
}
also never baeware of declaring variables inside loop body since they are redeclared in each iteration - it is bad pratice.
EDIT: LoL, this code always prints false, it cannot print true since
b=5*i;
and 5*i is never equal to i
EDIT^2:
As CodeGuru suggested, with a==i it prints true only once:
int a=25,b;
boolean value;
for (double i=1;i<=a;i++) {
b=5*(int)i;
value= i==a;
if (value) {
System.out.println(value);
}
}
b inside the for loop as given in the original because it is only used inside the for loop and not afterwards. On the other hand, one solution to the OP's question takes advantage of declaring value outside the loop so that you can keep its value for each iteration.
One way to do this is similar to adding a list of numbers. You need an accumulator which is a variable that holds the result so far. Declare this before the loop:
boolean value = false;
Now inside the loop, use the |= operator:
value |= (b == i);
However, this seems like an ugly solution. What are you going to do with the true value when you find it?
int a = 25;
for (double i = 1; i <= a; i++) {
double b = 5 * i;
if (b == a) {
boolean value = b == a;
System.out.println(value);
}
}
This will work
a == i?