Basic Codes

/* First program in Apex */

system.debug('Welcome to Apex Programming'.);
system.debug('This is my first Apex Program'.);



/* Write an Apex code to define a variables and print the values: */
==============================================================
integer customerCode;
string customerName;

    system.debug(customerCode);
    system.debug(customerName);

    system.debug('customerCode is...' +customerCode);
    system.debug('customerName is...' +customerName);

customerCode = 123456;
customerName = 'Mallika';

    system.debug('customerCode is...' +customerCode);
    system.debug('customerName is...' +customerName);
    
    
    /* Write an apex program to calculate the total and average marks of 5 subjects: */
=============================================================================

integer English, Hindi, Maths, Physics, Chemistry, Total, Average;

	English = 90;
	Hindi = 75;
	Maths = 99;
	Physics = 85;
	Chemistry = 90;

	Total = English + Hindi + Maths + Physics + Chemistry;
	system.debug('Total Marks are ...' +Total);
	
	Average = Total / 5;
	system.debug('Average Marks are ...' +Average);

/* Write an apex program to calculate sum of first 100 numbers: */
============================================================

integer n, sum;

	n = 100;
	sum = (n*(n+1)) / 2;

 	system.debug('Sum of the numbers is ...' +sum);
  
  /* Write an apex program to define two numerical variables to perform all the mathematical calculations and print the values: */
===========================================================================================================================

integer firstNumber, secondNumber, result;

		firstNumber = 150;
		secondNumber = 10;

		result = firstNumber + secondNumber;
		system.debug('Sum of Two numbers is ...' +result);

		result = firstNumber - secondNumber;
		system.debug('Difference of Two numbers is ...' +result);

		system.debug('Multiply value of Two numbers is ...' +(firstNumber * secondNumber));

		system.debug('Division value of Two numbers is ...' +(firstNumber / secondNumber));

		system.debug('Reminder value of Two numbers is ...' + Math.Mod(firstNumber, secondNumber));