CODEWITHSUNDEEP
java
K Mass
K Mass

Reputation: 53

Boolean and for loop JAVA

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?

Upvotes: 0

Views: 8832

Answers (4)

Name_is_Subbu
Name_is_Subbu

Reputation: 1

      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

Upvotes: 0

linski
linski

Reputation: 5094

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);
    }
}

Upvotes: 1

arshajii
arshajii

Reputation: 129507

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;
    }
}

Upvotes: 4

Code-Apprentice
Code-Apprentice

Reputation: 83527

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?

Upvotes: 0

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