4??: JavaScript? ??? ? ??

JavaScript ?? 4??? ?? ?? ?????! ??? ?????? ??? ??? ??? ??? ???? ??? ???????. ? ??? ??? ???? ??? ??? ??? ????? ??? ? ?? ? ????.

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1. ???

???? ???? ??? ?? ??? ?? ??? ?? ? ????. JavaScript? ??? ??? ???? ?? ?? ??? ?????.

If-Else ?

if ?? ??? ???? ??? true?? ??? ?????. else ?? ??? false? ? ?? ??? ?????.

??:

if (condition) {
  // Code to execute if condition is true
} else {
  // Code to execute if condition is false
}

?:

let age = 18;
if (age >= 18) {
  console.log("You are eligible to vote.");
} else {
  console.log("You are not eligible to vote.");
}

Else-If ???

?? ??? ?????? else if? ?????.

?:

let score = 75;
if (score >= 90) {
  console.log("Grade: A");
} else if (score >= 75) {
  console.log("Grade: B");
} else {
  console.log("Grade: C");
}

Switch-Case ??

switch ?? ?? if-else ??? ?????. ?? ??? ???? ???? ?? ??? ?? ? ?????.

??:

switch (expression) {
  case value1:
    // Code to execute if expression === value1
    break;
  case value2:
    // Code to execute if expression === value2
    break;
  default:
    // Code to execute if no cases match
}

?:

let day = 3;
switch (day) {
  case 1:
    console.log("Monday");
    break;
  case 2:
    console.log("Tuesday");
    break;
  case 3:
    console.log("Wednesday");
    break;
  default:
    console.log("Invalid day");
}

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2. ??

??? ?? ??? ?? ? ???? ? ?????.

For ??

for ??? ?? ?? ???? ?????.

??:

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

?:

for (let i = 1; i <= 5; i++) {
  console.log("Count:", i);
}

While ??

??? ?? ?? while ??? ?????.

??:

while (condition) {
  // Code to execute
}

?:

let count = 1;
while (count <= 5) {
  console.log("Count:", count);
  count++;
}

Do-While ??

do-while ??? ??? ???? ?? ??? ??? ? ? ????? ???.

??:

do {
  // Code to execute
} while (condition);

?:

let count = 1;
do {
  console.log("Count:", count);
  count++;
} while (count <= 5);

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3. ?? ????

• Break: ??? ?? ?????.
• ??: ?? ??? ???? ?? ???? ?????.

?:

for (let i = 1; i <= 10; i++) {
  if (i === 5) break; // Stops the loop when i is 5
  console.log(i);
}

for (let i = 1; i <= 10; i++) {
  if (i === 5) continue; // Skips iteration when i is 5
  console.log(i);
}

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4. ?? ??

???? ??

???? ????? ??? ????? ?????.

?:

if (condition) {
  // Code to execute if condition is true
} else {
  // Code to execute if condition is false
}

???

??? ???? ?? ??? ????? ???? ??? ?????.

?:

let age = 18;
if (age >= 18) {
  console.log("You are eligible to vote.");
} else {
  console.log("You are not eligible to vote.");
}

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??? ??

1. if-else ?? ???? ??? ???? ???? ???? ????? ?????.
2. ??? ??? ?? ???? ????? for ??? ????.
3. while ??? ???? 1?? 50??? ??? ?? ?????.
4. continue? ???? 3?? ?? ? ?? ??? ????? for ??? ?????.

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4?? ??

?? ??? ??? ?????:

1. ???: if-else ? switch-case? ???? ??? ????.
2. ??: for, while ? do-while ??? ???? ??? ?????.
3. Break and Continue: ?? ??? ?????.
4. ???? ?? ? ???? ?? ?? ??.

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?? ??

5????? ??? ??? ?? ??? ???? ??? ????? ???? ????? ??? ??? ???. 2024? 12? 12?? ??????!

? ??? JavaScript? ??? ? ??? ?? ?????. ??? ??? PHP ??? ????? ?? ?? ??? ?????!