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EvenNuminDigit.java
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EvenNuminDigit.java
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import javax.print.attribute.standard.NumberUpSupported;
public class EvenNuminDigit {
public static void main(String[] args) {
int[] nums={12,7,82,-9,6,-7845,-55};
System.out.println(findNumber(nums));
//this is an short cut of finding number of digits
System.out.println(digit2(1245));
}
static int findNumber(int[] nums){
int count=0;
for (int num : nums) {
if(even(num)){
count++;
}
}
return count;
}
static boolean even(int num){
int numberofDiigts=digits(num);
// if(numberofDiigts%2==0){
// return true;
// }
// return false;
return numberofDiigts % 2 == 0;
}
static int digits(int num){
int coutn=0;
if(num < 0){
num=num*-1;
}
if(num ==0 ){
return -1;
}
while(num>0){
coutn++;
num/=10;
}
return coutn;
}
// This log10 will give you number of digits.
static int digit2(int num){
return (int)(Math.log10(num)+1);
}
}