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SEENUVASAN P
SEENUVASAN P

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Day 9 : Learning JavaScript While Loops – Simple Number Patterns

Today I practiced JavaScript and explored how to use while loops to print different number patterns. It was fun and helped me understand how loops work step by step.

Pattern 1: Print 12345

Code:

let i = 1;
while (i <= 5) {
  document.write(i);
  i++;
}
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Output:

12345
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Pattern 2: Print 54321

Code:

let i = 5;
while (i >= 1) {
  document.write(i);
  i--;
}
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Output:

54321
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Pattern 3: Print 369

Code:

let i = 3;
while (i <= 9) {
  document.write(i);
  i += 3;
}
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Output:

369
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Pattern 4: Print 531

Code:

let i = 5;
while (i >= 1) {
  document.write(i);
  i -= 2;
}
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Output:

531
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What I Learned: 

while loops repeat a block of code as long as the condition is true.

We can control the output pattern using the loop’s start value, condition, and increment/decrement.

Practicing small patterns like these helps build logic for bigger problems.
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