if..else construction
C
C++
C#
Common Lisp
Dart
F#
Go
Java
JavaScript
Kotlin
Python
Rust
C
int n = 21;
if (n > 22)
{
printf("n > 22 \n");
}
else if (n < 22)
{
printf("n < 22 \n");
}
else
{
printf("n == 22 \n");
}C++
#include <iostream>
int main()
{
int n {21};
if (n > 22)
{
std::cout << "n > 22" << std::endl;
}
else if (n < 22)
{
std::cout << "n < 22" << std::endl;
}
else
{
std::cout << "n == 22" << std::endl;
}
// if-else with variable initialization
int a {5};
int b {3};
if(int c {a - b}; a > b)
{
std::cout << "a + b = " << c << std::endl;
}
else
{
std::cout << "a - b = " << c << std::endl;
}
}
C#
C#
int n = 21;
if(n > 22)
{
Console.WriteLine("n > 22");
}
else if (n < 22)
{
Console.WriteLine("n < 22");
}
else
{
Console.WriteLine("n = 22");
}
Common Lisp
Lisp
(let ((n 21))
(if (> n 22)
(format t "n > 22")
(if (< n 22)
(format t "n < 22")
(format t "n = 22"))))
If the if block must have several expressions, which are formatted using the progn operator:
Lisp
(let ((n 21))
(if (< n 22)
(progn
(format t "n < 22~%")
(format t "n != 22~%"))))
To test the truth of a condition, you can also use the when macro, which is similar to if..then:
Lisp
(let ((n 21))
(when (< n 22)
(format t "n < 22~%")
(format t "n != 22~%")))
The unless macro is equivalent to an else expression and tests the opposite condition:
Lisp
(let ((n 22))
(when (< n 22)
(format t "n < 22~%")
(format t "n != 22~%"))
(unless (< n 22)
(format t "n >= 22~%")))
Dart
Dart
void main() {
int n = 21;
if(n > 22){
print("n > 22");
}
else if(n < 22){
print("n < 22");
}
else{
print("n = 22");
}
}
F#
F#
let n = 21
if n > 22 then
printfn "n > 22"
elif n < 22 then
printfn "n < 22"
else
printfn "n = 22"
Getting the result from if..then
F#
let a = 21
let b = 22
let res = if(a > b) then 1 elif(a < b) then -1 else 0
printfn "%d" res
Go
Go
package main
import "fmt"
func main() {
n := 21
if n > 22 {
fmt.Println("n > 22")
} else if n < 22{
fmt.Println("n < 22")
} else{
fmt.Println("n == 22")
}
}
Java
Java
class Program {
public static void main(String[] args) {
int n = 21;
if(n > 22)
{
System.out.println("n > 22");
}
else if (n < 22)
{
System.out.println("n < 22");
}
else
{
System.out.println("n = 22");
}
}
}
JavaScript
JavaScript
let n = 21;
if(n > 22) {
console.log("n > 22");
}
else if (n < 22){
console.log("n < 22");
}
else{
console.log("n == 22");
}
Kotlin
Kotlin
fun main() {
val n = 21
if(n > 22) {
println("n > 22")
}
else if(n < 22){
println("n < 22")
}
else{
println("n = 22")
}
}
Getting the result from if..else
Kotlin
fun main() {
val a = 21
val b = 22
val res = if(a > b) 1 else if(a < b) -1 else 0
println(res) // -1
}
Python
Python
n = 21
if n > 22:
print("n > 22")
elif n < 22:
print("n < 22")
else:
print("n = 22")
Getting the result from if..else
Python
a = 21
b = 22
res = 1 if(a > b) else -1
print(res)
Rust
Rust
fn main(){
let n = 21;
if n > 22 {
println!("n > 22")
}
else if n < 22 {
println!("n < 22")
}
else{
println!("n = 22")
}
}
Getting the result from if..else
Rust   Â
fn main(){
let a = 21;
let b = 22;
let res = if a > b {1} else {-1};
println!("{}", res);
}
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