# If () else () Statement in programming

Source: Internet
Author: User

Example () else ()

Double D = convert. todouble (console. Readline ());

If (D> = 60 & D <= 100)

{

Console. writeline ("pass ");

}

Else

{

Console. writeline ("fail ");

}

Example

1. Rounding a floating point number to an integer.

Console. Write ("Enter :");

Double D = convert. todouble (console. Readline ());

If (D-(INT) d >=0.5)

{

D = (INT) D;

D ++;

}

Else

{

D = (INT) D;

}

Console. writeline ("Result:" + D. tostring ());

2. Obtain the root of a quadratic equation (A * x + B * x + c = 0)

Console. writeline ("A * x + B * x + c = 0, the root of the equation ");

Console. Write ("Enter: A = ");

Double A = convert. todouble (console. Readline ());

Console. Write ("Enter B = ");

Double B = convert. todouble (console. Readline ());

Console. Write ("Enter: c = ");

Double C = convert. todouble (console. Readline ());

If (A = 0)

{

Console. writeline ("This is not a quadratic equation !!! ");

}

Else

{

Double DR = B * B-4 * a * C;

If (Dr> 0)

{

Double X1 = (-B + math. SQRT (DR)/2 *;

Double X2 = (-B-math. SQRT (DR)/2 *;

Int C1 = (INT) x1;

Int C2 = (INT) x2;

Console. writeline ("two unequal roots, X1 = {0}, X2 = {1}", C1, C2 );

}

If (DR = 0)

{

Double X = (-B)/2 *;

Int C3 = (INT) X;

Console. writeline ("there is a root, x =" + C3 );

}

If (Dr <0)

{

Console. writeline ("no real root! ");

}

}

3. Determine whether the weight is standard (Men's Standard Weight = height-100 ± 3; Women's Standard Weight = height-110 ± 3)

Console. writeline ("Weight Detection Program ");

Console. Write ("Enter Gender :");

String x = convert. tostring (console. Readline ());

Console. Write ("Enter the weight (kg ):");

Double T = convert. todouble (console. Readline ());

Console. Write ("Enter height (CM ):");

Double S = convert. todouble (console. Readline ());

If (x = "male" | x = "female ")

{

If (x = "male ")

{

Double bzt1 = s-100 + 3; // bzt1 indicates the standard weight.

Double bzt2 = s-100-3; // bzt2 is the standard weight.

If (T> bzt1)

{

Console. writeline ("you can swim without a lifebuoy ");

}

Else if (T <= bzt1 & T> = bzt2)

{

Console. writeline ("good figure, continue to maintain ");

}

Else

{

Console. writeline (" ~ Eat more in the future ");

}

}

Else

{

Double bzt1 = s-110 + 3;

Double bzt2 = seconds-110-3;

If (T> bzt1)

{

Console. writeline ("you can swim without a lifebuoy ");

}

Else if (T <= bzt1 & T> = bzt2)

{

Console. writeline ("good figure, continue to maintain ");

}

Else

{

Console. writeline (" ~ Eat more in the future ");

}

}

}

Else

{

Console. writeline ("Friends, don't even know the gender? ");

}

If () else () Statement in programming

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