// Created by supersen /*The following code will help you in understanding the various conditionals and loops and their use in different situations */ alert("Check out the code and like it if it helped you. Feel free to correct me if i am wrong or misleading somewhere. Thanks"); /* IF */ // Example 1: var x=5; if(x>4) { document.write(" 1. As x (here x=5) is in this case is greater than 4 , hence condition is evaluated as true. " + "
"+"
") ; } // Example 2: var y=5 ; if(y>4 && y<6) { document.write(" 2. Here also as 5 is the only number(int) which satisfies the above condition stated , hence we get the condition evaluated "+ "
"+"
"); } /*IF ELSE */ function numb(x,y) { if (x>y) { document.write("3. " + x + " is greater than " + y + "
"+"
" ) ; } else { document.write("4. " + x + " is less than " + y + "
"+"
" ); } } numb(12,10); numb(8,10); /* SWITCH-Normal */ document.write(" 5.To perform normal switch case : " + "
" ); document.write(" Output--> ") var z = 4; switch (z) { case 1: document.write("red"); break; case 2: document.write("green"); break; case 3: document.write("cyan"); break; case 5: document.write("yellow"); break; case 6: document.write("black"); break; default : document.write("white" + "
"); } /* SWITCH with Fallthrough*/ // Example 1: document.write(" Different cases of Fallthrough : -> " +"
") var u= 6; switch (u) { case 1: document.write(" ha ha "); break; case 2: case 3: case 4: case 5: case 6: document.write(" 5.1 ha ha ha ha ha " + "
") break; case 7: default: document.write(" not funny hmmm "); } //Example 2: var fruit = "mango"; switch(fruit) { case "apple": case "mango": case "watermelon": case "banana": document.write(" 5.2 This is " + fruit + "." + "
" + "
"); break; default: document.write(" Eat fruits."); } /* Here we can see that even if the case:mango is matched at 2nd step, that case looks for a break statement so that it can jump out of the loop.hence it falls through the other cases untill a case with break statement is found. Always use break statement after cases.Fall through can be utilized properly depending upon the requirement */ /*FOR Loop */ //for(init;condition;iteration) document.write("

6. The following loop will output numbers as per the condition given in \'for loop'\ :

" ); function learn(x) { for(i=0;i<=x;i++) { document.write(i + "
" ) ; } } learn(6); /* WHILE Loop */ document.write("

7.The following while loop is easy to understand :

" + "
" ); function tp(q) //function declaration { while(q<10) { document.write( "7." + q + " The square is: " + q*q + "
" ); q++; // If you don't declare this infinte loop will occur } } tp(0); //function call /* DO WHILE Loop*/ document.write( "

8. Do While Loop :

" + "
" ); function say() //function declaration { document.write(" Hello !" + "
" ); } var p=0; do{ say(); //function call p++; } while(p<5); /* BREAK and CONTINUE */ // Break: document.write("

9. Use of break and continue :

" + "
"); var m; for(m=0;m<=10;m++) { if(m==6) { break; // terminates the loop } document.write( " The number is at " + m+ "th" + " position " + "
" ); } //Continue: document.write("

Continue :

" + "
"); var n; for(n=0;n<8;n++) { if( n===4 ) { continue ; //skips the statement conditioned and resumes execution } document.write( " The number is at " + n+ "th" + " position " + "
" ); }

for undrstanding if if else switch loop ...