Java iterative statements
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The document discusses different types of iterative statements in Java including while, do-while, for, enhanced for loops, and the continue statement. It provides the syntax and examples of each statement type. The while loop executes statements until a condition is false. The do-while loop executes statements once, then checks the condition. The for loop allows initialization, condition checking, and increment/decrement in the header. The enhanced for loop iterates over arrays or collections. The continue statement skips the current iteration in a loop.
![while loop example
public class WhileExample
{
public static void main(String args[])
{
int i = 0;
while (i < 10)
{
System.out.println("i: “ +i);
i++;
}
}
}
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![Do-while loop example
public class DoWhileExample
{
public static void main(String args[])
{
int i = 1;
do
{
System.out.println("i: “ +i);
i++;
} while (i < 10) ;
}
}
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![for loop example
public class ForExample
{
public static void main(String args[])
{
for (int i=1; i<=5; i++ )
{
System.out.println("i: “ +i);
}
}
}
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![Enhanced for loop example
public class EnhancedForExample
{
public static void main(String args[])
{
int [] numbers = {10, 20, 30, 40, 50};
for(int i : numbers ) // for(int i=0; i < numbers; length(); i++)
{
System.out.println("i: “ +i); // System.out.println( “i: “+numbers[i] );
}
}
}
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![continue statement
• The continue statement skips the current iteration of a loop
• In while and do loops, continue causes the control to go directly to the test
condition and then continue the iteration process
• In case of for loop, the increment section of the loop is executed before the test
condition is evaluated.
public class ContinueExample
{
public static void main(String[] args)
{
int [] num = {10, 20, 30, 40, 50};
for(int i : num )
{
if( i == 3 )
continue;
}
System.out.println( "i: "+i );
}
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Java iterative statements
- 1. Looping (or) Iterative Statements Dr. Kuppusamy .P Associate Professor / SCOPE
- 2. Content • while • do… while • For • enhance for • continue statements Dr. Kuppusamy P
- 3. Iterative Statements • Iterative Statements - one or set of statements executed multiple times based on a condition. • Three types of Iterative Statements in java • while • do… while • for • enhanced for Dr. Kuppusamy P
- 4. while loop Syntax: while (condition) { Statements //Body of the loop } Dr. Kuppusamy P
- 5. while loop example public class WhileExample { public static void main(String args[]) { int i = 0; while (i < 10) { System.out.println("i: “ +i); i++; } } } Dr. Kuppusamy P
- 6. Do - while loop Syntax: do { Statements //Body of the loop } while (condition) ; Dr. Kuppusamy P
- 7. Do-while loop example public class DoWhileExample { public static void main(String args[]) { int i = 1; do { System.out.println("i: “ +i); i++; } while (i < 10) ; } } Dr. Kuppusamy P
- 8. for loop Syntax: for(initialization; condition; increment/decrement) { Statements //Body of the loop } Dr. Kuppusamy P Repeat Yes No Statements Initialization; Condition; increment/decrement
- 9. for loop example public class ForExample { public static void main(String args[]) { for (int i=1; i<=5; i++ ) { System.out.println("i: “ +i); } } } Dr. Kuppusamy P
- 10. Enhanced for loop Syntax: for(declaration : Expression) { Statements //Body of the loop } Dr. Kuppusamy P
- 11. Enhanced for loop example public class EnhancedForExample { public static void main(String args[]) { int [] numbers = {10, 20, 30, 40, 50}; for(int i : numbers ) // for(int i=0; i < numbers; length(); i++) { System.out.println("i: “ +i); // System.out.println( “i: “+numbers[i] ); } } } Dr. Kuppusamy P
- 12. continue statement • The continue statement skips the current iteration of a loop • In while and do loops, continue causes the control to go directly to the test condition and then continue the iteration process • In case of for loop, the increment section of the loop is executed before the test condition is evaluated. public class ContinueExample { public static void main(String[] args) { int [] num = {10, 20, 30, 40, 50}; for(int i : num ) { if( i == 3 ) continue; } System.out.println( "i: "+i ); } Dr. Kuppusamy P
- 13. References Dr. Kuppusamy P Herbert Schildt, “Java: The Complete Reference”, McGraw-Hill Education, Tenth edition, 2017.