3 Basic Conditionals

Hello World,

Today we will be discussing conditionals. These conditionals were pretty easy for me to understand. Basically you have 3 conditionals, or at least 3 that we will cover today. They are “if”, “else if”, and “else”. You may be familiar with these conditionals if you have had any programming experience before in a common programming language.

Conditionals are commonly used to test a comparison. I made a basic program that uses user input to test which number is the largest of 3 numbers. Of course anyone can tell you which number is largest off first glance of 3 numbers. However, this program uses all 3 conditionals in an easy to understand way.

Below is my program.

Basically, it starts by asking the user to enter 3 numbers. The numbers are instance variables as learned in a previous post. Then there are some conditionals. A, b, and c correspond to the first number inputted, the second number inputted, and the third number inputted respectively. The first tests if a is larger than both c and b. If it is, then it is displayed as the largest. Then within each if and if else statement, there is a test to see if the highest number is positive or negative. If it is greater than zero, it is positive. Otherwise it is negative (else). The second conditional asks if c is larger than b and a. If it is, the program figures out if it is negative or positive again. The third conditional asks if b is larger than both a and c, then figures out if it is negative or positive. Then the last else if statement tests if a is larger than b, but c is larger than b, then tests the negative and positive.

This is how a potential output may look.

Hope you enjoyed this lesson. Let me know if anything is unclear.

Thanks!