What is if in C?

Answer 1

If is a keyword that introduces a conditional expression. If the expression evaluates true, the statement or statement block that follows is executed, otherwise control is passed to the line following the statement or statement block, which may be another conditional expression.

if( expression_1 )

{

// do something when expression_1 is true

}

else if( expression_2)

{

// do something when expression_1 is false but expression_2 is true

}

else

{

// do something when both expression_1 and expression_2 are false

}