Node Programming Examples

ES6 do_while loop

node

var n = 10;   
do { 
   console.log(n); 
   n--; 
} 
while(n>=0);

ES6 while loop

node

var num = 5; 
var factorial = 1; 

while(num >= 1) { 
   factorial = factorial * num; 
   num--; 
} 
console.log("The factorial  is "+factorial);

ES6 for_of loop

node

for (let val of[12 , 13 , 123]) {   
   console.log(val) 
}

ES6 for_in loop

node

var obj = {a:1, b:2, c:3};  
for (var prop in obj) { 
   console.log(obj[prop]); 
}

ES6 for loop

node

"use strict" 
for(let temp, i = 0, j = 1; j<30; temp = i, i = j, j = i + temp) 
console.log(j);

ES6 switch_case Statement

node

var grade = "A"; 
switch(grade) { 
   case "A": { 
      console.log("Excellent"); 
      break; 
   } 
   case "B": { 
      console.log("Good"); 
      break; 
   }
   case "C": { 
      console.log("Fair"); 
      break;    
   } 
   case "D": { 
      console.log("Poor"); 
      break; 
   }  
   default: { 
      console.log("Invalid choice"); 
      break;              
   } 
}

ES6 else_if Ladder

node

var num = 2 
if(num > 0) { 
   console.log(num+" is positive") 
} else if(num < 0) { 
   console.log(num+" is negative") 
} else { 
   console.log(num+" is neither positive nor negative") 
}

ES6 if_else Statement

node

var num = 12; 
if (num % 2==0) { 
   console.log("Even"); 
} else { 
   console.log("Odd"); 
}

ES6 typeof operator

node

var num = 12 
console.log(typeof num); //output: number

ES6 Conditional Operator

node

var num = -2 
var result = num > 0 ?"positive":"non-positive" 
console.log(result)

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