Dart Loop is used to run a block of code repetitively for a given number of times or until matches the specified condition. Loops are essential tools for any programming language. It is used to iterate the Dart iterable such as list, map, etc. and perform operations for multiple times. A loop can have two parts – a body of the loop and control statements. The main objective of the loop is to run the code multiple times.\u00a0Dart\u00a0supports the following type of loops.<\/p>\n\n\n\n
We describe a brief introduction to the dart loops as follows.<\/p>\n\n\n\n
The for loop is used when we know how many times a block of code will execute. It is quite same as the\u00a0C for loop. The syntax is given below.<\/p>\n\n\n\n
Syntax –<\/strong><\/a><\/a><\/a><\/p>\n\n\n\n The loop iteration starts from the initial value. It executes only once.<\/p>\n\n\n\n The condition is a test-expression and it is checked after each iteration. The for loop will execute until false returned by the given condition.<\/p>\n\n\n\n The incr\/decr is the counter to increase or decrease the value.<\/p>\n\n\n\n Let’s understand the following example.<\/p>\n\n\n\n Example –<\/strong><\/p>\n\n\n\n <\/a><\/a><\/a><\/p>\n\n\n\n Output:<\/strong><\/p>\n\n\n\n The for\u2026in loop is slightly different from the for loop. It only takes dart object or expression as an iterator and iterates the element one at a time. The value of the element is bound to var, which is and valid and available for the loop body. The loop will execute until no element left in the iterator. The syntax is given below.<\/p>\n\n\n\n Syntax –<\/strong><\/p>\n\n\n\n <\/a><\/a><\/a><\/p>\n\n\n\n Example :<\/strong><\/a><\/a><\/a><\/p>\n\n\n\n Output:<\/strong><\/p>\n\n\n\n We need to declare the iterator variable to get the element from the iterator.<\/p>\n\n\n\n The while loop executes a block of code until the given expression is false. It is more beneficial when we don’t know the number of execution. The syntax is given below.<\/p>\n\n\n\n Syntax:<\/strong><\/p>\n\n\n\n <\/a><\/a><\/a><\/p>\n\n\n\n Let’s understand the following example.<\/p>\n\n\n\n Example –<\/strong><\/a><\/a><\/a><\/p>\n\n\n\n Output:<\/strong><\/p>\n\n\n\n The do\u2026while loop is similar to the while loop but only difference is that, it executes the loop statement and then check the given condition. The syntax is given below.<\/p>\n\n\n\n Syntax –<\/strong><\/p>\n\n\n\n <\/a><\/a><\/a><\/p>\n\n\n\n Example –<\/strong><\/a><\/a><\/a><\/p>\n\n\n\n Output:<\/strong><\/p>\n\n\n\n The selection of a loop is a little bit difficult task to the programmer. It is hard to decide which loop will be more suitable to perform a specific task. We can determine the loop based on the following points.<\/p>\n\n\n\n Dart Loop is used to run a block of code repetitively for a given number of times or until matches the specified condition. Loops are essential tools for any programming language. It is used to iterate the Dart iterable such as list, map, etc. and perform operations for multiple times. A loop can have two […]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[916],"tags":[],"_links":{"self":[{"href":"https:\/\/mudassirbackup.infinitycodestudio.com\/index.php\/wp-json\/wp\/v2\/posts\/3598"}],"collection":[{"href":"https:\/\/mudassirbackup.infinitycodestudio.com\/index.php\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/mudassirbackup.infinitycodestudio.com\/index.php\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/mudassirbackup.infinitycodestudio.com\/index.php\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/mudassirbackup.infinitycodestudio.com\/index.php\/wp-json\/wp\/v2\/comments?post=3598"}],"version-history":[{"count":0,"href":"https:\/\/mudassirbackup.infinitycodestudio.com\/index.php\/wp-json\/wp\/v2\/posts\/3598\/revisions"}],"wp:attachment":[{"href":"https:\/\/mudassirbackup.infinitycodestudio.com\/index.php\/wp-json\/wp\/v2\/media?parent=3598"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/mudassirbackup.infinitycodestudio.com\/index.php\/wp-json\/wp\/v2\/categories?post=3598"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/mudassirbackup.infinitycodestudio.com\/index.php\/wp-json\/wp\/v2\/tags?post=3598"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}for(Initialization; condition; incr\/decr) { \n\/\/ loop body \n}<\/code><\/pre>\n\n\n\nvoid main() \n{ \n int num = 1; \n for(num; num<=10; num++) \/\/for loop to print 1-10 numbers \n { \n print(num); \/\/to print the number \n } \n} <\/code><\/pre>\n\n\n\n1\n2\n3\n4\n5\n6\n7\n8\n9\n10\n<\/code><\/pre>\n\n\n\nDart for\u2026 in Loop<\/h2>\n\n\n\n
for (var in expression) { \n\/\/statement(s) \n} <\/code><\/pre>\n\n\n\nvoid main() \n{ \n var list1 = [10,20,30,40,50]; \n for(var i in list1) \/\/for..in loop to print list element \n { \n print(i); \/\/to print the number \n } \n} <\/code><\/pre>\n\n\n\n10\n20\n30\n40\n50\n<\/code><\/pre>\n\n\n\nDart while loop<\/h2>\n\n\n\n
while(condition) { \n \/\/ loop body \n} <\/code><\/pre>\n\n\n\nvoid main() \n{ \n var a = 1; \n var maxnum = 10; \n while(a<maxnum){ \/\/ it will print until the expression return false \n print(a); \n a = a+1; \/\/ increase value 1 after each iteration \n} \n} <\/code><\/pre>\n\n\n\n1\n2\n3\n4\n5\n6\n7\n8\n9\n<\/code><\/pre>\n\n\n\nDart do\u2026while Loop<\/h2>\n\n\n\n
do { \n \/\/ loop body \n} while(condition); <\/code><\/pre>\n\n\n\nvoid main() \n{ \n var a = 1; \n var maxnum = 10; \ndo \n { \n print(\"The value is: ${a}\"); \n a = a+1; \n }while(a<maxnum); \n} <\/code><\/pre>\n\n\n\nThe value is: 1\nThe value is: 2\nThe value is: 3\nThe value is: 4\nThe value is: 5\nThe value is: 6\nThe value is: 7\nThe value is: 8\nThe value is: 9\n<\/code><\/pre>\n\n\n\nSelection of the loop<\/h2>\n\n\n\n