Java for loop

Опубликовано: 09 Апрель 2017
на канале: kudvenkat

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In this tutorial, we will discuss java for loop syntax along with a demo in eclipse IDE

for loop allows iterating fixed or known number of times

Consists of
1. Initialization Expression : initializes the loop
2. Termination Expression : terminates loop when evaluated false
3. Increment Expression : changes the value after every iteration
4. Statements to repeat

for loop syntax

for (initialization-expression; termination-expression;
increment-expression) {
statement(s)-to-repeat;
}

for loop example:
for (int i=1; i[=10; i++)
{
System.out.println(“Iteration “ + i);
}

java for loop enhanced version

// for loop for collections and arrays

for (int x : numbers ) {
System.out.println(“Count is :” + i);
}

Limitations
1. Cannot be used to delete elements
2. Can work with single collection at a time

infinite for loop syntax in java
for ( ; ; ) {
}

java for loop multiple variable initialization
for (int i=1, j[20; i[=20; i++,j--)
{
System.out.println(i+j);
}

java nested for loop
for (int i=1; i[=5; i++)
{
for (int j=1; j[=i; j++) {
System.out.print(“*”);
}
System.out.println();
}

Output:
*
**
***
****
*****

The increment block can also call methods.
Example:
public class ForDemo {
public static void main(String args[]) {
for (int i=0; i[2; i++, printMethod()) {
System.out.println(“For Iteration started”);
}
private static void printMethod() {
System.out.println(“For Iteration executed); }
}
}

Note : Please replace [ with LessThan Symbol

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