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In Python there is an efficient for else loop implementation described here
Example code:
for x in range(2, n): if n % x == 0: print n, 'equals', x, '*', n/x break else: # loop fell through without finding a factor print n, 'is a prime number' In Java I need to write more code to achieve the same behavior:
finishedForLoop = true; for (int x : rangeListOfIntegers){ if (n % x == 0) { //syso: Some printing here finishedForLoop = false break; } } if (finishedForLoop == true){ //syso: Some printing here } Is there any better implementation similar to Python for else loop in Java?
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In most of the programming languages (C/C++, Java, etc), the use of else statement has been restricted with the if conditional statements. But Python also allows us to use the else condition with for loops. The else block just after for/while is executed only when the loop is NOT terminated by a break statement.
In Python the for loop can also iterate over any sequence such as a list, a string, or a tuple. Java also provides a variation of its for loop that provides the same functionality in its so called for each loop.
If the number of iteration is fixed, it is recommended to use for loop. If the number of iteration is not fixed, it is recommended to use while loop. If the number of iteration is not fixed and you must have to execute the loop at least once, it is recommended to use the do-while loop.
Use a for loop when you know the loop should execute n times. Use a while loop for reading a file into a variable. Use a while loop when asking for user input. Use a while loop when the increment value is nonstandard.
It's done like this:
class A { public static void main(String[] args) { int n = 13; found: { for (int x : new int[]{2,3,4,5,6,7,8,9,10,11,12}) if (n % x == 0) { System.out.println("" + n + " equals " + x + "*" + (n/x)); break found; } System.out.println("" + n + " is a prime number"); } } } $ javac A.java && java A 13 is a prime number If you love us? You can donate to us via Paypal or buy me a coffee so we can maintain and grow! Thank you!
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