# Scala program to print numbers from 1 to 10 using while, do-while, and for loop

Here, we are going to learn how to print numbers from 1 to 10 using while, do-while, and for loop in Scala programming language?
Submitted by Nidhi, on May 06, 2021

Problem Solution:

Here, we will print numbers from 1 to 10 using the while, do-while, and for loop on the console screen.

Program/Source Code:

The source code to print numbers from 1 to 10 using while, do-while, and for loop is given below. The given program is compiled and executed on the ubuntu 18.04 operating system successfully.

In the below programs, we used an object-oriented approach to create the program. We created an object Sample. We defined main() function. The main() function is the entry point for the program.

## Print numbers from 1 to 10 using while loop

```// Scala program to implement "while" loop
// to print numbers from 1 to 10

object Sample {
def main(args: Array[String]) {
var cnt:Int=0

// Counter variable initialization
cnt=1
while(cnt<=10)
{
printf("%d ",cnt)
// Counter variable updation
cnt=cnt+1
}
println()
}
}
```

Output:

```1 2 3 4 5 6 7 8 9 10
```

Explanation:

Here, we created an integer variable cnt, which is initialized with 0. we will use the cnt variable as a counter variable in the while loop. Here, we printed the value of the counter variable on the console screen till it's become 10.

## Print numbers from 1 to 10 using do-while loop

```// Scala program to demonstrate "do-while" loop
// to print numbers from 1 to 10

object Sample {
def main(args: Array[String]) {
var cnt:Int=0

// Counter variable initialization.
cnt=1;

do
{
printf("%d ",cnt);
cnt=cnt+1; //Counter variable updation
}while(cnt<=10)

println()
}
}
```

Output:

```1 2 3 4 5 6 7 8 9 10
```

Explanation:

Here, we created an integer variable cnt, which is initialized with 0. we will use the cnt variable as a counter variable in the do-while loop. Here, we printed the value of the counter variable on the console screen till it's become 10.

## Print numbers from 1 to 10 using for loop

```// Scala program to demonstrate "for" loop
// to print numbers from 1 to 10

object Sample {
def main(args: Array[String]) {
for( cnt <- 1 to 10 )
{
printf("%d ",cnt);
}
println()
}
}
```

Output:

```1 2 3 4 5 6 7 8 9 10
```

Explanation:

Here, we printed numbers from 1 to 10 using the to keyword in the for loop on the console screen.