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Java

Posted by Vrund Patel
Vrund Patel
11,994 Points

Checking if an integer is present in a number.

For example: 144, 148, 204, 14, 4, 124

How do I check a if 4 is present in an integer and print something if it is present. I have to go through an array of numbers 1-210.

I tried 

i % 10 == 4

However that does not take care of all the numbers containing 4.

1 Answer

Seth Reece
Seth Reece
32,867 Points

Probably need to put each number in a variable as a string and use contains. http://www.tutorialspoint.com/java/number_tostring.htm http://www.tutorialspoint.com/java/lang/string_contains.htm

Vrund Patel
Vrund Patel
11,994 Points

Program is to generate numbers from 1 to 210 and check which contains 4. Should I convert each to String?

Seth Reece
Seth Reece
32,867 Points

You might be able just check it in an if statement by making a String x = 4 and checking if i.toString().contains(x). that or as part of your loop Make String n = to i.toString() and then if n.contains(x).

Vrund Patel
Vrund Patel
11,994 Points

Cannot convert int to a String - error.

Vrund Patel
Vrund Patel
11,994 Points

Got it to work.

Seth Reece
Seth Reece
32,867 Points

Nice! Good work!