FAQ: Learn Java: Variables - Review

Frequently Asked Questions Java FAQ
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This community-built FAQ covers the “Review” exercise from the lesson “Learn Java: Variables”.

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This exercise can be found in the following Codecademy content:

Learn Java

FAQs on the exercise Review

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Why is string called an object data type with built-in behaviour ? what is the ‘built-in behaviour’ in it ?

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why couldn’t we use float data type for desiredSalary variable instead of the fact that it is only upto 2 decimal places?

1 Like
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The float data type provides precision up to 7 digits after decimals whereas double datatype provides precision up to 15 digits. We can use the float to represent the respective value but keeping the course easier to pick up, the double datatype has been introduced in the lesson and that’s why it is there.

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how can we print out everything we did in one line of code by just typing in the variables

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# In one line of code: printf
System.out.printf("Name: %s,\nAge: %d,\nDesired Salary: %.2f,\nGender: %c,\nLooking for job: %b",
name, age, desiredSalary, gender, lookingForJob);
# or if you prefer
System.out.printf("%s, %d, %.2f, %c, %b", name, age, desiredSalary, gender, lookingForJob);


# In two lines: format & println
String myString = String.format("Name: %s,\nAge: %d,\nDesired Salary: %.2f,\nGender: %c,\nLooking for job: %b", 
name, age, desiredSalary, gender, lookingForJob);
System.out.println(myString);

For other format specifiers, see