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Perform an action multiple times based on a boolean condition, checked before the first action (WHILE .. DO)
Starting with a variable x=1, Print the sequence
"1,2,4,8,16,32,64,128," by doubling x and checking that x is less than 150.
clojure
(take-while #(< % 150) (iterate #(* 2 %) 1))
csharp
int x = 1;
while (x < 150)
{
x *= 2;
Console.Write("{0},", x);
}
while (x < 150)
{
x *= 2;
Console.Write("{0},", x);
}
Perform an action multiple times based on a boolean condition, checked after the first action (DO .. WHILE)
Simulate rolling a die until you get a six. Produce random numbers, printing them until a six is rolled. An example output might be
"4,2,1,2,6"
clojure
(loop [r (rand-int 6)]
(if (= r 5)
nil
(do
(println r)
(recur (rand-int 6)))))
(if (= r 5)
nil
(do
(println r)
(recur (rand-int 6)))))
csharp
System.Random die = new System.Random();
int roll;
do
{
roll = die.Next(1, 6);
Console.Write(roll);
if (roll < 6) Console.Write(",");
}
while (roll != 6);
int roll;
do
{
roll = die.Next(1, 6);
Console.Write(roll);
if (roll < 6) Console.Write(",");
}
while (roll != 6);
Perform an action a fixed number of times (FOR)
Display the string
"Hello" five times like "HelloHelloHelloHelloHello"
clojure
(dotimes [_ 5]
(print "Hello"))
(print "Hello"))
csharp
string text = "Hello";
for (int i = 0; i < 5; i++)
{
Console.Write(text);
}
for (int i = 0; i < 5; i++)
{
Console.Write(text);
}
Perform an action a fixed number of times with a counter
Display the string
"10 .. 9 .. 8 .. 7 .. 6 .. 5 .. 4 .. 3 .. 2 .. 1 .. Liftoff!"
clojure
(dotimes [i 10]
(print (str (- 10 i) " .. ")))
(println "Liftoff!")
(print (str (- 10 i) " .. ")))
(println "Liftoff!")
csharp
for (int i = 10; i > 0; i--)
{
Console.Write("{0} .. ", i);
}
Console.WriteLine("Liftoff!");
{
Console.Write("{0} .. ", i);
}
Console.WriteLine("Liftoff!");
