(Check a number) Write a program that prompts the user to...

Key Concepts

Divisibility

Divisibility is a fundamental concept in number theory that determines whether one number can be divided by another without leaving a remainder. In programming, this concept is typically checked using the modulus operator, which provides a straightforward way to verify if the remainder is zero when one number is divided by another.

Modulus Operator

The modulus operator returns the remainder of a division operation. In programming tasks, it is commonly used to check for divisibility by confirming that a number divided by another results in a remainder of zero. This operator is essential for implementing conditions based on factors or multiples of numbers.

Conditional Statements

Conditional statements, such as if-else constructs, allow a program to execute specific sections of code based on whether certain conditions are met. These are crucial in decision-making processes within a program, enabling different actions to be taken based on the results of logical checks.

Logical Operators

Logical operators, including AND, OR, and NOT, are used to evaluate multiple conditions simultaneously in a program. They allow the programmer to combine simple conditions into more complex queries, such as checking whether a number meets several divisibility criteria at once or ensuring that only one of multiple possible conditions is true.

User Input Handling

User input handling involves capturing data provided by the user through input devices such as keyboards. This is crucial for creating interactive programs that can process variable data during runtime, making them adaptable to different user scenarios.

Transcript

00:01 Hello, welcome to this lesson.

00:01 In this lesson, we will write a java program and we'll let user enter value and we'll check whether the value is either divisible by five or six, but not both.

00:16 We will also check whether the value is divisible by both five and six.

00:22 And lastly, we'll check whether the number is divisible by either five or six.

00:34 Alright, so let's go on.

00:37 First of all, we can have a scanner so that we get user input.

00:43 So scanner is c, because in new scanner, we'll use the scanner object to get the user input.

00:53 So system .in, let me pass in that.

00:57 I will not have the second parameter declared.

01:03 Alright, then let me have, let me show on the screen what user will do.

01:10 So i'll say system .output.

01:12 I'll say enter your number.

01:18 So this is the number that we'll check whether it meets those conditions.

01:23 And now let's have an integer x, which would store the number into, so x is equals to the scanner, we invoke a method called nest int.

01:37 Alright, then this is what we do to check.

01:40 So say, if x is divisible by five and six, this will be our output.

02:01 The x is divisible by both five and six.

02:15 Alright, so let's implement this, we'll do if x divided by here, the only way x will be divisible by five and six is if x is divisible by 30.

02:41 Alright, so we say x mode 30 equals to zero, if we divide the x by 30, and the remainder is equals to zero, so here we are using the module.

02:57 So if x mode 30 is equals to zero, then it means that x is divisible by six, not divisible by five.

03:05 Conversely, we can check whether it is divisible by five and divisible by six.

03:12 But the short way of doing this is to check whether x is divisible by 30.

03:19 So if this is the case, new system .output.

03:23 We'll say this value x, which will actually put in the real value.

03:33 So it's divisible by both five and six.

03:43 Alright, so you also check else if so use the else condition to check if it is either divisible by five and no six, or six and no five, then this output will print...

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