M1D26 – Conditional Logic

Date: July 11, 2023
Tags: 2023 PBA April Term, BSc Computer Science, ITP1, University of London

else and elseif

var name;


function setup() 
{
    createCanvas(512,512);
    
    name = "Simon";
    
    if(name == "Simon")
    {
        console.log("Hello Simon!");
    }
    else if(name == "Samantha")
    {
        console.log("Hello Samantha");
    }
    else if(name == "Scott")
    {
        console.log("Hello Scott");
    }
    else if(name == "Sabina")
    {
        console.log("Hello Sabina");
    }
    else
    {
        console.log("Hey I don't know you");
    }
    
}
if(gameState == 0)
    {
        gameState = 1;
        countdown = 1000;
    }
    else if(gameState == 1)
    {
        if(key == secretKey)
        {
            gameState = 3;
        }
        else if(key == hotKey)
        {
            countdown += 15;
        }
        else
        {
            if(floor(random(0,5)) == 0)
            {
                gameState = 2;
            }
        }
    }
    else if(gameState == 2)
    {
        gameState = 0;
    }
    else if(gameState == 3)
    {
        gameState = 0;
    }

else if

Allows us to set up multiple conditions for a chain together

if(/*condition*/)
{
//action 1
}
else if(/*condition 2*/)
{
//action 2
}
else if(/*condition 3*/)
{
//action 3
}
else //other conditions
//action 4, if no conditions are met
}

Rule in nesting – if the first action happens, it will no longer check the succeeding conditions. If two conditions is mandatory, nest the second set of conditions separately.

|| and &&

Logical operation || (OR)

if(A || B) //A or B 
}
//action
{

//example

if(gameState == 0)
    {
        gameState = 1;
        countdown = 200;
    }
    else if(gameState == 1)
    {
        if(key == secretKey)
        {
            gameState = 3;
        }
        else if(key == hotKey || key == hotKey1 || key == hotKey2)
        {
            countdown += 15;
        }
        else if(random() > 0.5)
        {
            //
        }
    }
    else if(gameState == 2)
    {
        gameState = 0;
    }
    else if(gameState == 3)
    {
        gameState = 0;
    }

When working on same conditions, full conditions must be written. role == A || role == B and not role == A || B

Logical Operator && (or)

if(role == A && role == B)
{
//action
}

Variables normally cannot have two values at the same time.

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