Using for Loops
Explore how to use for loops in Dart to run code repeatedly and process collections. Learn the differences between indexed for loops and for-in loops, when to use each, and how to add conditions inside loops to filter data effectively.
Imagine having to print 100 copies of a document. Instead of pressing the print button 100 times, it is much more efficient to tell the printer to print 100 copies at once. The printer performs an operation repeatedly in a loop until it reaches its goal.
In computer programming, we frequently encounter scenarios where we need to execute a block of code multiple times. Dart provides for loops for this exact purpose.
The indexed for loop
The indexed for loop allows us to specify a precise range of numbers over which we want our loop to run. We must define three components within the parentheses, separated by semicolons:
Initialization: The starting value of our iterator variable (e.g.,
var i = 0).Condition: The boundary that must evaluate to
truefor the loop to continue (e.g.,i < 5).Update: ...