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web-api
answered Jun 23 '23 00:00
Loop are used to repeatedly execute a block of code until a certain condition is met. There are several types of loops available in most programming languages. Here are the commonly used types of loops:
For Loop : A for loop is used when you know the number of iterations in advance. It typically has a counter variable that is incremented or decremented in each iteration. The loop continues until the counter reaches a specified value. The syntax of a for loop varies across programming languages but generally follows this structure:
for initialization; condition; increment/decrement {
// code to be executed
}
While Loop : A while loop repeatedly executes a block of code as long as a specified condition remains true. The loop continues until the condition evaluates to false. The condition is checked before every iteration, and if it's false initially, the loop might not run at all. The basic syntax of a while loop is as follows:
while condition {
// code to be executed
}
Do-While Loop: A do-while loop is similar to a while loop but with a slight difference. In a do-while loop, the block of code is executed at least once, and then the condition is checked. If the condition is true, the loop continues; otherwise, it terminates. The structure of a do-while loop is typically as follows:
do {
// code to be executed
} while (condition);
Foreach Loop : A foreach loop is specifically designed for iterating over elements in a collection or array. It automatically traverses each element without the need for an explicit counter or index. This type of loop is particularly useful when working with collections or when you want to iterate through all elements. The syntax of a foreach loop varies depending on the programming language, but it generally follows this pattern:
for element in collection {
// code to be executed
}
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