Loops are very important for programming. Code in a loop is run over and over until a condition is met.

loop.syjs

for (var x = 0; x < 5; x++) {
    print(x);
}

loop.sypy

for x in range(0,5):
    print(x)

loop.syjava

for (int x = 0; x < 5; x++) {
    print(x);
}

Output:

01234

This loop sets x to zero and runs the code inside until x is equal to or greater than 5. After each time the loop runs, it adds 1 to x (x++ is a shortcut for typing x = x + 1).