JavaScript control structures are essential for managing the flow of your programs. They allow you to make decisions, repeat actions, and handle different scenarios. Here's a breakdown of the most common ones:

Conditional Statements 🟢

Use if, else if, and else to execute code based on conditions:

if (condition) {
    // code if condition is true
} else if (anotherCondition) {
    // code if anotherCondition is true
} else {
    // default code
}
  • Tip: Always use curly braces {} for clarity, even if the block has only one line.
  • Image:
    conditional_logic

Loops 🔁

Loop structures repeat code until a condition is met:

  • for loop:
    for (initialization; condition; increment) {
    // code
}
  • while loop:
    while (condition) {
    // code
}
  • do...while loop:
    do {
    // code
} while (condition);
  • Image:
    loop

Switch Case 🔄

Use switch for multiple condition checks:

switch (expression) {
    case value1:
        // code
        break;
    case value2:
        // code
        break;
    default:
        // default code
}
  • Note: switch works with exact matches only.
  • Image:
    switch_case

Logical Operators 🧠

Combine conditions using && (AND), || (OR), and ! (NOT):

if (x > 0 && y < 10) {
    // both conditions must be true
}
  • Image:
    logical_operators

For more examples and practice, check out our JavaScript Fundamentals Guide. 📚