学ぶ The `for` Loop

JavaScript Fundamentals

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One of the most popular loops, which is available in almost every programming language, is known as the for loop. The for loop is primarily used for executing a block of code a specific number of times.

The general syntax of the for loop is as follows:

for(initialization; condition; operation) {
  // code to be executed
}

The initialization part is where we declare & initialize a variable, this part is executed only once - at the start of the loop. The boolean expression in place of the condition defines the loop condition - the loop executes as long as that condition is true. The operation can be any expression which is evaluated or executed after every successful iteration.

The flow of a for loop can be better understood through a flowchart:

Following is an example of a simple for loop which executes a block of code 15 times:


              123
            
for(let i = 0; i < 15; i++) {
  console.log("This is the " + i + "th iteration");
}

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セクション 1. 章 65

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セクション 1. 章 65

The `for` Loop

1. What is the primary purpose of a `for` loop?

2. In the `for` loop syntax, which part is executed only once?

3. What will be the output of the following code?

The `for` Loop

1. What is the primary purpose of a for loop?

2. In the for loop syntax, which part is executed only once?

3. What will be the output of the following code?

1. What is the primary purpose of a `for` loop?

2. In the `for` loop syntax, which part is executed only once?