I want to print out how many times Math.random() was less that 0.5 and how many thimes it was bigger that 0.5. So I use int sum variable and increase it each time as you can see in the code:
package shapes;
public class Main {
public static void main(String[] args) {
for (int i=1; i<6; i++){
int sum1=0;
if(Math.random()<0.5){
System.out.println("head");
System.out.println(Math.random());
sum1++;
System.out.println("sum of head"+sum1);
}else {
int sum2=0;
System.out.println("tail");
System.out.println(Math.random());
sum2++;
System.out.println("sum of tail"+sum2);
}
}
}
}
My output is :
tail 0.2420579681161944 sum of tail1 head 0.712979930711983 sum of head1 tail 0.28072067461911476 sum of tail1 head 0.5897197845744805 sum of head1 head 0.6735600614954825 sum of head1
I want the output to be like this :
tail 0.2420579681161944 head 0.712979930711983 tail 0.28072067461911476 head 0.5897197845744805 head 0.6735600614954825 sum of head 3 sum of tail 2
I actually tried to put sum1++ and sum2++ in different places but did not worked . thanks
Answer
You reset sum to 0 each time in the for loop. Move your sums variable declaration out of the loop.
int sum1=0;
int sum2=0;
for (int i=1; i<6; i++){
double val = Math.random();
if(val<0.5){
sum1++;
}else {
sum2++;
}
System.out.println("sum of head "+sum1);
System.out.println("sum of tail "+sum2);
}