What is if-statement

Answer 1

https://www.sololearn.com/learn/Java/2143/?ref=app

Answer 2

if and else are pretty much as they appear.
If(1==1){
do this
}
else{
else do this
}
If the information in the ( ) is true, then the code inside the if brackets will run. if the information is false, for example if(1==2) then it will skip that code block and instead run the else block

Answer 3

https://www.bbc.com/education/guides/z2p9kqt/revision/2