For Loops While Loops AP Computer Science A

For Loops, While Loops AP Computer Science A

For Loop Array. List<Integer> array 1; String array 2[ ]; for( int i = 0; blank ; i++ ) { // to go thru array 1 what would you put in the blank } for( int j = 0; blank; j++ ) { // to go thru array 2 what would you put in the blank }

Answer Array. List<Integer> array 1; String array 2[ ]; for( int i = 0; i < array 1. size( ); i++ ) { // What would you put here to get each element // of array 1? } for( int j = 0; j < array 2. length; j++ ) { // What would you put here to get each element // of array 2? }

Answer Array. List<Integer> array 1; String array 2[ ]; for( int i = 0; i < array 1. size( ); i++ ) { Integer temp = array 1. get( i ); } for( int j = 0; j < array 2. length; j++ ) { String temp = array 2[ j ]; } Note: you do not have to call your variable temp, but everything else should be the same.

You can do the same thing with a while loop int i = 0; while( i < array 1. size( ) ) { Integer temp = array 1. get( i ); if( temp. equals( new Integer( 1 ) ) System. out. println( “Found a 1”); i++; } This is equivalent to for( int i = 0; i < array 1. size( ); i++ ) { Integer temp = array 1. get( i ); if( temp. equals( new Integer( 1 ) ) System. out. println( “Found a 1”); }

Single For Loops You typically use single for loops to search through an array or Array. List looking for a specific value. You might also use a for loop to print out all of the elements in an array or Array. List. You can adjust the values , and search or print only a portion of the array or Array. List. for( int i = 2; i < array 1. size( ); i++ ) { // do something } The above code will only traverse those elements in array 1 starting with index 2 to the end.

Double For Loops You typically use double for loops to print things such as. * ** *** OR 1 12 123 OR 111 11 1