IF 1g 2023-05-02 laplante@plcb.ca GOWEB/:anguage

title: “IF Statement” author: “laplante@plcb.ca” date: 2023-05-02 version: “1.0.0” section: “1g”

category: “GOWEB/Language”

Name

if — Conditional branching in goweb

Description

In goweb, conditional logic is implemented using the if statement.
It allows branching execution flow based on the evaluation of logical expressions.

Supported forms:

• if logical-expression { ... }
• if logical-expression { ... } else { ... }
• if logical-expression { ... } else if logical-expression { ... } else { ... }

The expression inside the if must evaluate to a boolean result.
Execution proceeds into the first matching branch, or into the else block if no condition matches.

Examples

res = {{
    i := 5;
    if i < 10 { "if is true"; }
}};

// Result:
res = "if is true"

res = {{
    i := 5;
    if i < 10 { "if is true"; } else { "if is false"; }
}};

// Result:
res = "if is true"

res = {{
    i := 5;
    if i < 4 { "if is true"; } else { "if is false"; }
}};

// Result:
res = "if is false"

res = {{
    i := 5;
    if i < 10 {
        "if is true";
    } else {
        "if is false";
    }
}};

// Result:
res = "if is true"

res = {{
    i := 0;
    if i < 10 {
        "i < 10";
    } else if i < 12 {
        "i < 12";
    } else {
        "i >= 15";
    }

    i = 11;
    if i < 10 {
        "i < 10";
    } else if i < 12 {
        "i < 12";
    } else {
        "i >= 15";
    }

    i = 16;
    if i < 10 {
        "i < 10";
    } else if i < 12 {
        "i < 12";
    } else {
        "i >= 15";
    }
}};

// Result:
res = "i < 10i < 12i >= 15"

res = {{
    i := 11;
    if i < 10 {
        "i < 10";
    } else if i < 12 {
        "i < 12";
        i := 100;
        i;
    } else {
        "i >= 15";
    }
    i;
}};

// Result:
res = "i < 1210011"

res = {{
    i := 10;
    for i > 0 {
        i;
        if i %! (MISSING)== 0 {
            "i="; i; i%!;(MISSING) " is even\n";
        } else {
            "i="; i; i%!;(MISSING) " is odd\n";
        }
        i = i - 1;
    }
}};

// Result:
res =
10i=100 is even
9i=91 is odd
8i=80 is even
7i=71 is odd
6i=60 is even
5i=51 is odd
4i=40 is even
3i=31 is odd
2i=20 is even
1i=11 is odd