For Loop

Loop
Loops allow a block of code to run multiple times as long as a given condition is satisfied. They help reduce repetition and make programs more efficient and organized.

• Loops continue running until the condition becomes false.
• They are useful for iterating over arrays, strings, and ranges of values.

for Loop

• For Loops can execute a block of code a number of times.
• For Loops are fundamental for tasks like performing an action multiple times.

syntax

for (initialization; condition; increment/decrement)  
{ // Code to execute}

Example

<!-- 1 1 1 1 1 -->
 <script>
    for(let a=1; a<=5; a++){
        console.log(1);
    }
</script>


<!-- 1 2 3 4 5 -->
<script>
    for(let b=1; b<=5; b++){
        console.log(b);
    }
</script>


<!-- 1 3 5 7 9 -->
<script>
     for(let c=1; c<10; c+=2){
         console.log(c);
     }
</script>


<!-- 3 6 9 12 15 -->
<script>
    for(let d=1; d<=15; d++){
        if(d%3==0){
            console.log(d);
        }
    }
</script>


<!-- Multiples of 3 and 5 -->
<script>
    for(let e=1; e<=50; e++){
        if(e%3==0 && e%5==0){
            console.log(e);
        }
    }
</script>


<!-- Multiples of 3 or 5 -->
<script>
    for(let f=1; f<=20; f++){
        if(f%3==0 || f%5==0){
            console.log(f);
        }
    }
</script>


<!-- Divisors of given number -->
<script>
    let gN=50;
    for(let g=1; g<=gN; g++){
        if(gN%g==0){
            console.log(g);
        }
    }
</script>


<!--count of Divisors of given number -->
<script>
    let hN=50;
    let count=0;
    for(let h=1; h<=hN; h++){
        if(hN%h==0){
            count++;
        }
    }
    console.log("count:" +count);
</script>


<!-- prime number -->
<script>
   let iN=10;
    let countt=0;
    for(let i=1; i<=iN; i++){
        if(iN%i==0){
            countt++;
        }
    }
    if(countt==2){
        console.log("prime");
    }
    else{
        console.log("not prime");
    }
</script>