Dart Programming – If Else Statement (if , if..else, Nested if, if-else-if)
Decision-making statements are those statements that allow the programmers to decide which statement should run in different conditions. There are four ways to achieve this:
if Statement:
This type of statement simply checks the condition and if it is true the statements within it are executed but if it is not then the statements are simply ignored in the code.
Syntax:
if ( condition ){
// body of if
}
Example:
Dart
void main()
{
int gfg = 10;
if (gfg > 3) {
print( "Condition is true" );
}
}
|
Output:
Condition is true
if…else Statement:
This type of statement simply checks the condition and if it is true, the statements within are executed but if not then else statements are executed.
Syntax:
if ( condition ){
// body of if
}
else {
// body of else
}
Example:
Dart
void main()
{
int gfg = 10;
if (gfg > 30) {
print( "Condition is true" );
}
else {
print( "Condition id false" );
}
}
|
Output:
Condition is false
else…if Ladder:
This type of statement simply checks the condition and if it is true the statements within it are executed but if it is not then other if conditions are checked, if they are true then they are executed, and if not then the other if conditions are checked. This process is continued until the ladder is completed.
Syntax:
if ( condition1 ){
// body of if
}
else if ( condition2 ){
// body of if
}
.
.
.
else {
// statement
}
Example:
Dart
void main()
{
int gfg = 10;
if (gfg < 9) {
print( "Condition 1 is true" );
gfg++;
}
else if (gfg < 10) {
print( "Condition 2 is true" );
}
else if (gfg >= 10) {
print( "Condition 3 is true" );
}
else if (++gfg > 11) {
print( "Condition 4 is true" );
}
else {
print( "All the conditions are false" );
}
}
|
Output:
Condition 3 is true
Nested if Statement:
This type of statement checks the condition and if it is true then the if statement inside it checks its condition and if it is true then the statements are executed otherwise else statement is executed.
Syntax:
if ( condition1 ){
if ( condition2 ){
// Body of if
}
else {
// Body of else
}
}
Example:
Dart
void main()
{
int gfg = 10;
if (gfg > 9) {
gfg++;
if (gfg < 10) {
print( "Condition 2 is true" );
}
else {
print( "All the conditions are false" );
}
}
}
|
Output:
All the conditions are false
Try code of if-else with Operator:
Dart
void main() {
int x = 5;
int y = 7;
if ((++x > y--) && (++x < ++y)){
print( "Condition true" );
}
else {
print( "Condition false" );
}
print(x);
print(y);
}
|
Output:
Condition false
6
6
Last Updated :
06 Oct, 2023
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