The if statement in Go is used to test the condition. If it evaluates to true, the body of the statement is executed. If it evaluates to false, if block is skipped.
Syntax :
if(boolean_expression)
{
/* statement(s) got executed only if the expression results in true */
}
Use Case 1:
package main
import “fmt”
funcmain() {
var a int = 10
if( a % 2==0 ) { // if condition is true then print the following
fmt.Printf(“a is even number” )
}
}
Output:
Use Case 2:
package main
import “fmt”
funcmain() {
var iint = 10;
if ( i%2 == 0 ) {
/* if condition is true then print the following */
fmt.Printf(“i is even number”);
} else {
/* if condition is false then print the following */
fmt.Printf(“i is odd number”);
}
}
Output:
Use Case 3:
package main
import “fmt”
funcmain() {
fmt.Print(“Enter number: “)
var i int
fmt.Scanln(&i)
fmt.Print(i)
/* check the boolean condition */
if( i % 2==0 ) {
fmt.Println(” is even” );
} else {
fmt.Println(” is odd” );
}
}
Output:
Use Case 4:
package main
import “fmt”
funcmain() {
fmt.Print(“Enter text: “)
var Input int
fmt.Scanln(&input)
if (input 100) {
fmt.Print(“Please enter valid no”)
} else if (input >= 0 && input
fmt.Print(” Fail”)
} else if (input >= 50 && input
fmt.Print(” D Grade”)
} else if (input >= 60 && input
fmt.Print(” C Grade”)
} else if (input >= 70 && input
fmt.Print(” B Grade”)
} else if (input >= 80 && input
fmt.Print(” A Grade”)
} else if (input >= 90 && input
fmt.Print(” A+ Grade”)
}
}
Output:
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