as3.js

// Using for loops, write a Javascript program to output the following
// pattern -
// 1
// 2 3
// 4 5 6
// 7 8 9 10
var count= 1
for(i=1;i<=10;i++){
    for(j=1;j<=i;j++){
        process.stdout.write(count)
         
    }
    count = count+1
    console.log()
}


// 2. Write a program to find whether a given number is armstrong number or

// not-
// The Armstrong number is a number that is equal to the sum of cubes of

// its digits. For example 0, 1, 153, 370, 371 and 407 are the Armstrong
// numbers. Let's try to understand why 153 is an Armstrong number.
// 153 = (1*1*1)+(5*5*5)+(3*3*3) where:
// (1*1*1)=1
// (5*5*5)=125
// (3*3*3)=27
// So:
// 1+125+27=153

var no = 370
var sum = 1
arm = 0
for(let ele of no.toString()){
    for(let i = 1; i<= no.toString().length;i++){
        sum = Number(ele)*sum
    }
    arm = arm+sum
    sum = 1
    
}
if(arm === no){
    console.log(`${no} is armstrong number`);
}
else{
    console.log(`${no} is not armstrong number`);
}

// 3. Write a program to find whether a given number is special number or

// not-
// If the sum of the factorial of digits of a number (N) is equal to the

// number itself, the number (N) is called a special number.
// eg- 145 is a special number
// Logic- 1! + 4! + 5!= 1+24+120 i.e 14

num = 146
fact = 1
sum = 0
for(let elem of num.toString()){
    for(let i =1;i<=Number(elem);i++){
        fact = fact*i
    }
    sum = sum+fact
    fact =1
}
if(sum === num){
    console.log(`${num} is special number`);
}
else{
    console.log(`${num} is not a special number`);
}