Program to Calculate Factorial Using Recursion in Java.Numbers Divisble by 7 from 0 to 100 in Java.With the advancement of technology, it is important to promote online education via different mediums. We have Tutorials, Programs, Presentations and Articles in easy format. W3Professors is famous web site having mission to provide free online education to all. Menu-based Calculator Program in Java using Methods import ĭouble divide=0.0, remainder=0.0, power=0.0 So, we should develop a calculator program in java as Menu driven program. It is possible that the end-user doesn’t know which operator will do what operation. For this purpose we should use a loop.ģ) We are directly displaying the available operator. The program should ask for input until the end-user wants to continue. Due to this, after addition, if we want to subtract then again we need to run the program. So, for every operations (like addition, subtraction, multiplication, division, finding remainder, and calculating power) there will be seprate methods.Ģ) After performing one operation (like addition) Java completes, it doesn’t ask that “Do you want to next operation?”. These code for different operations should be placed in a different method. In the above java program we directly done every operations like addition, subtraction e.t.c using operators, but we shouldn’t do that. Now, we will do add some extra codes to this program.ġ) We should perform every operations through methods. We have successfully developed a simple basic calculator in Java using switch case statements. The output for the different test-cases:. Simple calculator program in Java using switch case import It is always recommended to initialize all the local variables with their default values. It is good programming practice to place all variables declaration at the top of the methods so programmers can easily understand. The double data type can hold both integer and floating-point numbers.

If you choose the data type of input variables as integer type (int/long) then the calculator doesn’t work on floating-point numbers so we should choose the variables as a double data type.

Two keywords are used in the program:- switch and case. The switch case statement in Java programming is a multi-way decision that tests whether an expression matches one of a number of constant integer values, and branches accordingly.

It can add, subtract, multiply, divide, find the remainder and also find the power of the number.įirst we will develop simple calculator program in java using switch case statements. It will be a basic calculator in java with CUI (character user interface). In this post, we will create a simple calculator program in the Java programming language. Simple Calculator Program in Java | Previously we had developed many basic Java programs on flow control statements.

Calculator in java